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Dell DD990 2.6 Storage System Administration Guide PDF

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Summary of Content for Dell DD990 2.6 Storage System Administration Guide PDF

Data Domain Boost for OpenStorage Version 2.6

Administration Guide 759-0053-0004

REV A

Copyright 2009-2013 EMC Corporation. All rights reserved. Published in USA.

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The information in this publication is provided as is. EMC Corporation makes no representations or warranties of any kind with respect to the information in this publication, and specifically disclaims implied warranties of merchantability or fitness for a particular purpose. Use, copying, and distribution of any EMC software described in this publication requires an applicable software license.

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2 Data Domain Boost for OpenStorage 2.6 Administration Guide

Preface 5

Introducing Data Domain Boost for OpenStorage 9

Overview of DD Boost for OpenStorage..........................................................10 Supported Configurations ............................................................................ 10

Installing DD Boost for OpenStorage 13

Installation Overview.....................................................................................14 OST Plug-In and DD OS Upgrades..................................................... 14 Firewalls and Ports........................................................................... 14 Enabling DD Boost on a Data Domain System...................................15

NetBackup Installation..................................................................................15 Installing the OST Plug-In on Media Servers......................................16 Install the UNIX Plug-In ....................................................................16 Install the Windows Plug-In.............................................................. 17 NetBackup Services......................................................................... 18

Backup Exec Installation............................................................................... 18 Installing the Plug-In on Media Servers.............................................18 Install the Windows Plug-In.............................................................. 19 Backup Exec Services.......................................................................20

Tuning Windows Media Servers for Performance............................................20 Uninstalling the Windows Plug-in.................................................................. 20

DD Boost Features 23

Overview of DD Boost Features......................................................................24 Heterogeneous Application Host Support......................................................24 DD Boost-over-Fibre Channel Transport......................................................... 24 Distributed Segment Processing ...................................................................26 Managed File Replication.............................................................................. 27

Low-Bandwidth Optimization........................................................... 28 Encrypted Managed File Replication.................................................28

Advanced Load Balancing and Link Failover.................................................. 29 Interfaces.........................................................................................31 Clients............................................................................................. 32

DD Boost Over Fibre Channel Path Management............................................32 Initial Path Selection........................................................................ 33 Dynamic Re-Balancing......................................................................33 Client Path Failover.......................................................................... 33 Queue-Depth Constraints.................................................................34

Virtual Synthetic Backups............................................................................. 34 Storage Quotas............................................................................................. 35 Media Server Access Validation.....................................................................36 Auto Image Replication................................................................................. 36

DD Boost for OpenStorage Configuration 39

Configuring the Data Domain System............................................................ 40

Chapter 1

Chapter 2

Chapter 3

Chapter 4

CONTENTS

Data Domain Boost for OpenStorage 2.6 Administration Guide 3

Creating Storage Units .....................................................................40 Configuring Quotas for Storage Units (Optional) .............................. 40 Configuring Distributed Segment Processing....................................41 Configuring Advanced Load Balancing and Link Failover ..................41 Configuring DD Boost-over-FC Service.............................................. 43 Throttling Managed File Replication..................................................44 Enabling Low-Bandwidth Optimization ............................................ 44 Enabling Encrypted Managed File Replication...................................45 Changing the Managed File Replication TCP Port.............................. 45 Configuring Media Server Access Validation.....................................45

Configuring a Media Server........................................................................... 46 NetBackup Configuration................................................................. 46 Backup Exec Configuration...............................................................68

Administration 83

Data Domain System Administration............................................................. 84 Optimized Duplication Version Compatibility................................... 84 Modifying an Interface Group........................................................... 84 Removing Advanced Load Balancing and Link Failover Configuration ........................................................................................................ 85 Sizing DD Boost-over FC Device-Set..................................................86

NetBackup Administration............................................................................ 88 Find your OST Plug-in Version...........................................................89 Find your NetBackup version............................................................89 Network Time-Outs...........................................................................89 Grouping Storage Units to Provide Failover.......................................90

Backup Exec Administration..........................................................................91 Find your OST plug-in version........................................................... 91 Find your Backup Exec version......................................................... 91 Delete Storage Units on Data Domain Systems.................................91 Recover Backup Files on an OpenStorage Device..............................91

Basic Troubleshooting 93

General Troubleshooting............................................................................... 94 Data Domain System Settings for File Replication.......................................... 94 NetBackup Troubleshooting.......................................................................... 94

Unable to Delete the Data Domain System....................................... 94 Check the installation 1................................................................... 95 Check Credentials............................................................................ 95 Resolve License Errors 1...................................................................96 Error Logging on the Media Servers.................................................. 96 Resolving Failed Backups on Media Servers..................................... 97 Resolve Plug-In Log Messages..........................................................98 Resolve Cannot connect on socket Error........................................99 NetBackup Backup Jobs Fail on Solaris Media Servers......................99 Optimized Duplication Job Fails......................................................100 Virtual Synthetic Backup................................................................ 100

Backup Exec Troubleshooting......................................................................100 Basic Troubleshooting................................................................... 100 Check the installation.................................................................... 100 Check Credentials for a Data Domain System................................. 101 Resolve License Errors....................................................................101 Set Up Active Debugging................................................................ 102

Chapter 5

Chapter 6

CONTENTS

4 Data Domain Boost for OpenStorage 2.6 Administration Guide

Preface

As part of an effort to improve its product lines, EMC periodically releases revisions of its software and hardware. Therefore, some functions described in this document might not be supported by all versions of the software or hardware currently in use. The product release notes provide the most up-to-date information on product features.

Contact your EMC technical support professional if a product does not function properly or does not function as described in this document.

Note

This document was accurate at publication time. Go to EMC Online Support (https:// support.emc.com) to ensure that you are using the latest version of this document.

Purpose This guide explains how to install, configure, and use the EMC Data Domain Boost for OpenStorage 2.6 with Data Domain systems.

Note

Always check the EMC Data Domain Support portal at https://my.datadomain.com for the latest version of this document before proceeding. Any printed or CD-based version of this document may be out-of-date.

Audience This guide is for system administrators who are familiar with Symantec backup applications and general backup administration.

Related EMC documentation The following Data Domain system documents provide additional information:

u EMC Data Domain Operating System Release Notes

u EMC Data Domain Operating System Initial Configuration Guide

u EMC Data Domain Operating System Administration Guide

u EMC Data Domain Operating System Command Reference Guide

u EMC Data Domain Expansion Shelf Hardware Guide

u The Data Domain system installation and setup guide for each of the supported platforms (for example DD890, DD690g, and so forth).

DD Boost for OpenStorage Backup Application Documentation Documentation for backup applications is available through the Symantec web site.

Symantec NetBackup Documentation From the general Symantec support page, navigate to the NetBackup Server product page and search the knowledge base for Documentation.

Note

To locate a document, enter its title as a search criterion in your favorite search engine.

u NetBackup Shared Storage Guide

u NetBackup Troubleshooting Guide

Preface 5

u NetBackup Commands

See these NetBackup documents for more information:

u NetBackup Backup, Archive, and Restore Getting Started Guide

u NetBackup Administrator's Guide for UNIX and Linux (two volumes)

u NetBackup Administrators Guide for Windows (two volumes)

u Best Practices for using Storage Lifecycle Policies in NetBackup.

u NetBackup 7.x Hardware Compatibility List that includes information for supported OpenStorage servers.

Symantec Backup Exec Documentation This document is installed with the application:

u Symantec Backup Exec 2012 Administrators Guide

u Backup Exec 2012 Hardware Compatibility List that includes information for supported OpenStorage servers.

Special notice conventions used in this document EMC uses the following conventions for special notices:

DANGER

Indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE

Addresses practices not related to personal injury.

Note

Presents information that is important, but not hazard-related.

Typographical conventions EMC uses the following type style conventions in this document:

Bold Use for names of interface elements, such as names of windows, dialog boxes, buttons, fields, tab names, key names, and menu paths (what the user specifically selects or clicks)

Italic Use for full titles of publications referenced in text

Monospace Use for: l System code

l System output, such as an error message or script

l Pathnames, filenames, prompts, and syntax

Preface

6 Data Domain Boost for OpenStorage 2.6 Administration Guide

l Commands and options

Monospace italic Use for variables

Monospace bold Use for user input

[ ] Square brackets enclose optional values

| Vertical bar indicates alternate selections - the bar means or

{ } Braces enclose content that the user must specify, such as x or y or z

... Ellipses indicate nonessential information omitted from the example

Where to get help EMC support, product, and licensing information can be obtained as follows:

EMC product information For documentation, release notes, software updates, or information about EMC products, go to EMC Online Support at https://support.emc.com.

The Documentation page at https://my.datadomain.com/documentation provides access to documents that are related to use of Data Domain product

Technical support Go to EMC Online Support and click Service Center. You will see several options for contacting EMC Technical Support. Note that to open a service request, you must have a valid support agreement. Contact your EMC sales representative for details about obtaining a valid support agreement or with questions about your account.

Your comments Your suggestions will help us continue to improve the accuracy, organization, and overall quality of the user publications. Send your feedback about this document to DPAD.Doc.Feedback@emc.com.

Preface

7

Preface

8 Data Domain Boost for OpenStorage 2.6 Administration Guide

CHAPTER 1

Introducing Data Domain Boost for OpenStorage

This chapter contains the following topics:

u Overview of DD Boost for OpenStorage..................................................................10 u Supported Configurations .....................................................................................10

Introducing Data Domain Boost for OpenStorage 9

Overview of DD Boost for OpenStorage Data Domain Boost (DD Boost) for OpenStorage enables media servers to communicate with storage systems without the need for Data Domain storage systems to emulate tape. In the context of Symantec backup applications (NetBackup and Backup Exec), there are two components to the software:

u An OST plug-in that you install on each media server. This plug-in includes the DD Boost libraries for integrating with the DD Boost server running on the Data Domain system.

u The DD Boost server that runs on Data Domain systems. A Data Domain system can be a single Data Domain system, a gateway, or a DD Extended Retention system or a Global Deduplication Array (GDA).

The backup application (NetBackup or Backup Exec) sets policies that control when backups and duplications occur. Administrators manage backup, duplication, and restores from a single console and can use all of the features of DD Boost, including WAN-efficient replicator software. The application manages all files (collections of data) in the catalog, even those created by the Data Domain system.

The Data Domain system exposes pre-made disk volumes called storage units to a DD Boost-enabled media server. Multiple media servers, each with the Data Domain OST plug-in, can use the same storage unit on a Data Domain system as a storage server. Each media server can run a different operating system, provided that it is supported by Data Domain and the backup applications NBU and BE.

The figure shows an example configuration of Data Domain Boost for Open Storage using NetBackup.

Figure 1 DD Boost for OpenStorage NetBackup Configuration

Supported Configurations Data Domain supports DD Boost on the following Data Domain systems:

u Appliance Series: DD990, DD890, DD880, DD860, DD690, DD670, DD660, DD640, DD630, DD620, DD610, DD580, DD565, DD530, DD510, DD160

u Gateway Series: DD880g, DD690g, DD580g

u Global Duplication Array Series: Based on DD 890 and DD880

Introducing Data Domain Boost for OpenStorage

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u DDX Array Series: DD880, DD690, DD580, DD880g, DD690g, DD580g

The OST plug-in version must be compatible with your Data Domain system and backup application configurations. Data Domain does not support combinations other than those detailed in the Data Domain Boost Compatibility Guide, which is available from the Data Domain Support portal https: //my.datadomain.com. Navigate to the Documentation >

Compatibility Matrices page and select Data Domain Boost Compatibility Guide.

Introducing Data Domain Boost for OpenStorage

Supported Configurations 11

Introducing Data Domain Boost for OpenStorage

12 Data Domain Boost for OpenStorage 2.6 Administration Guide

CHAPTER 2

Installing DD Boost for OpenStorage

Note

Complete descriptions of commands used in this guide are provided in the EMC Data Domain Operating System (DD OS) 5.4 Command Reference Guide.

This chapter covers the following topics:

u Installation Overview.............................................................................................14 u NetBackup Installation..........................................................................................15 u Backup Exec Installation....................................................................................... 18 u Tuning Windows Media Servers for Performance....................................................20 u Uninstalling the Windows Plug-in.......................................................................... 20

Installing DD Boost for OpenStorage 13

Installation Overview The overall steps for installing Data Domain Boost are as follows:

Procedure

1. Obtain the license required to enable DD Boost on the Data Domain system. You can purchase a DD Boost license key directly from EMC.

l The basic license allows you to back up and restore data.

l A separate replication license enables you to perform Managed File Replication or Automatic Image Replication. You must obtain a replication license for both the source and destination Data Domain systems.

2. Enable and configure DD Boost on the Data Domain system. At a minimum, configuration includes specifying the DD Boost user name and password, and creating storage units.

3. Install the OST plug-in software on each media server.

4. After completing the installation steps described in this chapter, configure DD Boost as described in the chapter DD Boost for OpenStorage Configuration on page 39.

OST Plug-In and DD OS Upgrades The OST plug-in and the DD OS maintain compatibility as defined in the Data Domain Boost Compatibility Guide. Consult that list before upgrading either the OST plug-in or the DD OS.

To take advantage of new features in a DD OS release, upgrade the OST plug-in to a corresponding version. Although an older version of the OST plug-in maintains compatibility with a newer version of DD OS, it does not take advantage of the new functionality available in DD OS. Perform the upgrade as described in Installing the OST Plug-In on Media Servers on page 16.

Note

This document illustrates the DD Boost configuration on Data Domain using commands in DD OS 5.4. If you are using a different version of DD OS with this version of the OST plug- in, see the corresponding DD OS version documentation for CLI details.

Firewalls and Ports

Note

This discussion applies only to DD Boost-over-IP.

The Data Domain system as it is initially configured does not work through a firewall (a media server to a Data Domain system, or from one Data Domain system to another). If you need the Data Domain system to work in the presence of a firewall, contact your network support provider.

The following ports must be open in a firewall for DD Boost backups and optimized duplication to work:

u TCP 2049 (NFS)

u TCP 2051 (Required for Managed File Replication but not needed for Automatic Image Replication)

u TCP 111 (NFS portmapper)

Installing DD Boost for OpenStorage

14 Data Domain Boost for OpenStorage 2.6 Administration Guide

u TCP 3008 (RSS) (Required for DD Extended Retention System and GDA (single and dual node)

Enabling DD Boost on a Data Domain System Every Data Domain system that is enabled for Data Domain Boost must have a unique name. You can use the Data Domain systems DNS name, which is always unique.

Procedure

1. On the Data Domain system, log in as an administrative user.

2. Verify that the file system is enabled and running by entering:

# filesys status The file system is enabled and running.

3. Add the DD Boost license using the license key that Data Domain provided:

# license add license_code License ABCE-BCDA-CDAB-DABC added.

4. Set the DD Boost user by entering:

# ddboost set user-name ddboost-user 5. Enable DD Boost by entering:

# ddboost enable DD Boost enabled

Note

l Only one user can be configured for DD Boost access on a Data Domain system at a time. The username, password, and role must have already been set up on the Data Domain system using the DD OS CLI command:

user add <user> [password <password>] [role {admin | security | user | backup-operator | data-access}] [min-days-between-change <days>] [max-days-between-change <days>] [warn-days-before-expire <days>] [disable-days-after-expire <days>] [disable-date <date>]

For example, to add a user with a login name of jsmith and a password of usr256 with administrative privilege, enter:

# user add jsmith admin password usr256 l The user must be configured in the backup application to connect to the Data

Domain system.

l In DD OS 5.2 the user role of backup-operator is introduced. See the EMC Data Domain Operating System 5.2 Administration Guide for details.

NetBackup Installation This section describes the commands used to install an OST plug-in within a NetBackup environment.

NetBackup environments consist of media servers and a master server. The master server manages clients and media servers and can also function as a media server. The OST plug-in must be installed on each media server. If a master server is also configured as a media server, then the OST plug-in must also be installed on the master/media server.

Installing DD Boost for OpenStorage

Enabling DD Boost on a Data Domain System 15

Note

Commands that run on the command line can be entered on either the master or the media server. If you run commands from the master server, use the -media_server option to tell NetBackup where to direct the operation that queries the plug-in about the storage servers properties.

This guide uses the NetBackup commands located in the following directories, which you need to add to your UNIX or Windows PATH.

Procedure

1. Add these directory locations to the UNIX PATH

$ export PATH=$PATH:/usr/openv/netbackup/bin: /usr/openv/netbackup/bin/admincmd:/usr/openv/volmgr/bin

2. Add these directory locations to the Windows PATH

$ PATH=%PATH%;C:\Program Files\Veritas\NetBackup\bin; C:\Program Files\Veritas\NetBackup\bin\admincmd; C:\Program Files\Veritas\Volmgr\bin

Installing the OST Plug-In on Media Servers The OST plug-in software must be installed on media servers that need to access the Data Domain system. When you upgrade the UNIX OST plug-in, the previous version of the plug-in is overwritten; therefore, you do not have to remove it. There are no special instructions for uninstalling the OST plug-in on UNIX systems.

Install the UNIX Plug-In Procedure

1. Download the latest version of the OST plug-in from the Data Domain Support portal. Verify the MD5 digest of the download to assure its integrity by using an MD5sum or digest utility.

2. Enter gunzip or an equivalent command to unzip the tar file. Save the file on the media server in a location of your choice.

3. Stop the backup applications Remote Manager and Monitor Service (nbrmms) process if it is running by entering:

# nbrmms -terminate 4. Install the OST plug-in (a set of libraries in a gtar package.)

5. Use the tar command to uncompress the file:

# tar -vxf filename 6. The package also contains an installation script called install.sh, which verifies

whether or not nbrmms has been stopped before starting the installation. Enter:

# install.sh -d directorypath

The directory path is optional. If you do not specify a directory path, the script uses /usr/openv/lib/ost-plugins, which is where the backup application normally looks for packages. The shared library files that the script installs are libstspiDataDomain.so and libstspiDataDomainMT.so.

7. If the plug-in already exists, you are prompted to enter y to proceed.

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16 Data Domain Boost for OpenStorage 2.6 Administration Guide

8. Restart the backup applications nbrmms process by entering:

# nbrmms

Correct UNIX plug-in installation or update failure (AIX Media Servers) Procedure

1. Stop the NetBackup Remote Manager and Monitor Service (nbrmms).

2. Enter:

# ./install.sh a plugin already exists, do you want to proceed with installation? (y or n) y Installing the Data Domain OpenStorage Client Libraries ... cp libstspiDataDomain.so /usr/openv/lib/ost-plugins/ libstspiDataDomain.socp: /usr/openv/lib/ost-plugins/libstspiDataDomain.so: Cannot open or remove a file containing a running program. ERROR in copying libstspiDataDomain.so to /usr/openv/lib/ost-plugins/libstspiDataDomain.so, error = 1

The install script might fail and display an error message that indicates that the plug- in already exists. This failure occurs if a plug-in is already installed and is being replaced by another instance.

3. If the install script fails:

a. Execute the following command:

# /usr/sbin/slibclean b. Enter:

# ./install.sh

Because the modules have now been unloaded from memory, the install.sh script should now run correctly.

Install the Windows Plug-In The Windows plug-in installer is libstspiDataDomainSetup.exe. It supports 32- and 64-bit Windows plug-ins.

Prepare for Installation Procedure

1. Download the latest version of the Windows OST plug-in installer from the Data Domain Support portal. Verify the MD5 digest of the download to assure its integrity, by using WinMD5 or similar utility. Unzip the plugin to extract libstspiDataDomainSetup.exe.

2. Verify the MD5 digest of the download to assure its integrity by using WinMD5 or similar utility.

3. Stop any NetBackup services. Follow the instructions given in NetBackup Windows Services on page 18 to stop the service.

4. Remove any previous plug-in version by using the Windows Control Panel or by executing the OST plug-in uninstall command in silent mode.

libstspiDataDomainUninstall.exe /S

or interactive mode:

libstspiDataDomainUninstall.exe

Installing DD Boost for OpenStorage

Install the Windows Plug-In 17

Start the Installation

You may choose to run the installation in an interactive mode or in silent mode.

Procedure

1. Double-click the set-up executable to launch the installer.

The installer determines whether NetBackup is installed and whether its respective services are running. If the installer detects a service running it displays a message to this effect and exits.

2. If the services have been stopped, the installer displays the license agreement. Read the terms and click I Agree to continue.

3. In the Choose Install Location dialog box, the correct destination folder is shown. This should not be changed. Click Install to start the installation.

A progress bar monitors the installation.

4. When the Installation is complete, you can click the Show details button to view the files installed and their location.

5. Restart all services. See NetBackup Windows Services on page 18.

6. Tune the Windows media server for performance. See Tuning Windows Media Servers for Performance on page 20.

NetBackup Services Follow the instructions for starting, stopping, and restarting UNIX or Windows services.

NetBackup UNIX Services To stop UNIX services, enter:

# nbrmms -terminate

To start or restart UNIX services, enter:

# nbrmms

NetBackup Windows Services Procedure

1. Go to Start > Control Panel > Administrative Tools > Services.

2. In the Services window, services are listed in alphabetical order by name. Locate the name NetBackup Remote Manager and Monitor Service. Its Status field shows the state of the service.

3. Select the service and right-click.

4. The menu that displays has options to Stop, Start, or Restart the service. Select the appropriate menu option.

Backup Exec Installation

Installing the Plug-In on Media Servers The OST plug-in software must be installed on media servers that need to access the Data Domain system. Because Backup Exec supports OpenStorage only on Windows media servers, the following section covers instructions for Windows servers only.

Installing DD Boost for OpenStorage

18 Data Domain Boost for OpenStorage 2.6 Administration Guide

Note

Backup Exec is not supported with DD Boost-over-FC.

Install the Windows Plug-In The Windows plug-in installer is libstspiDataDomainSetup.exe. It supports 32- and 64-bit Windows plug-ins.

Procedure

1. Prepare for installation.

a. Download the latest version of the Windows OST plug-in installer from the Data Domain Support web site. Verify the MD5 digest of the download to assure its integrity, by using WinMD5 or similar utility. Unzip the plugin to extract libstspiDataDomainSetup.exe.

b. Double-click the set-up executable to launch the installer. c. The installer determines whether Backup Exec is installed and whether its

respective services are running. If the installer detects a service running it displays a message to this effect and exits.

d. Stop any Backup Exec services. Follow the instructions given in Backup Exec Services on page 20 to stop the service.

e. Remove any previous plug-in version using either the Windows Control Panel or libstspiDataDomainUninstall.exe.

2. Start the installation.

a. If the services have been stopped, the installer displays the license agreement. Read the terms and Click I Agree to continue.

b. In the Choose Install Location dialog box, the correct destination folder is shown. This should not be changed. Click Install to start the installation.

A progress bar monitors the installation. c. When the Installation is complete, you can click the Show details button to view the

files installed and their location. d. Restart all services. See Backup Exec Services on page 20. e. Tune the Windows media server for DD Boost performance. See Tuning Windows

Media Servers for Performance on page 20.

3. Verify Backup Exec deduplication option.

a. From the Backup Exec menu bar, select Help from the About menu.

b. Select License Information. The Deduplication Option should be present in the dialog box. If it is not, re-run the Backup Exec installation and add the Backup Exec Server option.

Installing DD Boost for OpenStorage

Install the Windows Plug-In 19

Backup Exec Services

Start, Stop, or Restart Windows Services Procedure

1. Within Backup Exec, go to Tools > Backup Exec Services.

2. In the Backup Exec Services Manager window, select the server in the list and click the appropriate services button on the right side of the dialog box.

3. When the processing of the services is completed, click OK in the Backup Exec Services dialog box.

To Upgrade the Plug-in Procedure

1. Run the Backup Exec Services Manager and stop all services (do not close the dialog box).

2. Remove the old plug-in and install the new plug-in.

3. Return to the Backup Exec Services Manager dialog box to restart all services.

4. Close the dialog box.

Tuning Windows Media Servers for Performance For tuning information, refer to the Knowledge Base article, Tuning Windows Media Servers for Performance, Document ID 85209, available on the Data Domain Support portal.

Uninstalling the Windows Plug-in This procedures applies to NetBackup and Backup Exec.

Procedure

1. Stop the backup applications services.

2. Do one of the following:

Installing DD Boost for OpenStorage

20 Data Domain Boost for OpenStorage 2.6 Administration Guide

l Uninstall the Data Domain OpenStorage plug-in via Windows Control Panel uninstall/remove program feature (as you would uninstall a typical Windows program).

l Double-click libstspiDataDomainUninstall.exe, which was installed in the same directory as the plug-in. Click Uninstall. After the uninstall, click Show details to view which files were removed.

Installing DD Boost for OpenStorage

Uninstalling the Windows Plug-in 21

Installing DD Boost for OpenStorage

22 Data Domain Boost for OpenStorage 2.6 Administration Guide

CHAPTER 3

DD Boost Features

New and enhanced capabilities are available for Single Node and DD Extended Retention.

This chapter describes the major features and functionality of the DD Boost software in the following topics:

u Overview of DD Boost Features.............................................................................. 24 u Heterogeneous Application Host Support.............................................................. 24 u DD Boost-over-Fibre Channel Transport................................................................. 24 u Distributed Segment Processing ...........................................................................26 u Managed File Replication...................................................................................... 27 u Advanced Load Balancing and Link Failover.......................................................... 29 u DD Boost Over Fibre Channel Path Management....................................................32 u Virtual Synthetic Backups......................................................................................34 u Storage Quotas..................................................................................................... 35 u Media Server Access Validation.............................................................................36 u Auto Image Replication......................................................................................... 36

DD Boost Features 23

Overview of DD Boost Features Backup applications are a critical component of data recovery and disaster preparedness strategies. Each strategy requires a strong, simple, and flexible foundation that enables users to respond quickly and manage operations effectively.

EMC Data Domain systems integrate easily with backup software and provide retention and recovery benefits of inline deduplication. Additionally, Data Domain systems provide replication protection over the wide area network (WAN) for offsite disaster recovery.

Unlike virtual tape libraries (VTLs), EMC Data Domain Boost (DD Boost) software does not require any artifacts of tape or tape emulation. Similar to the Data Domain NFS/CIFS implementation, backup images can be written to, and read from, the Data Domain system simultaneously in the applications native image formats. Backup images can be expired one at a time, leading to improved storage efficiency.

DD Boost increases performance by distributing the deduplication process to the backup server, simplifies disaster recovery procedures, and provides the foundation for additional integration between backup applications and Data Domain systems.

Heterogeneous Application Host Support The combination of a Data Domain system and a backup application that supports DD Boost software creates an optimized connection to provide a tightly integrated solution. DD Boost offers operational simplicity by enabling backup applications to manage optimized connections between the backup application and one or more Data Domain systems.

DD Boost software simplifies the management and allows easy sharing and simultaneous use of disk storage among multiple heterogeneous backup application hosts. This facilitates load balancing and the use of the best available backup servers for completing a particular backup job based on pre-configured policies.

DD Boost software supports multiple backup server operating systems providing a seamless experience to both application vendors and application administrators in heterogeneous environments. Further, DD Boost serves as a consolidated interface to Data Domain storage systems, making the systems transparent to the backup application. This simplifies the management of Data Domain deduplication storage systems.

DD Boost-over-Fibre Channel Transport Prior to DD OS version 5.4, all communication between the DD Boost Library and any Data Domain system was performed using IP networking. The application specifies the Data Domain system using its hostname or IP address, and the DD Boost Library uses TCP/IP connections to transmit requests to, and receive responses from, the Data Domain system, as shown in the figure.

DD Boost Features

24 Data Domain Boost for OpenStorage 2.6 Administration Guide

Figure 2 DD Boost-over-IP Transport

DD OS release 5.4 introduces an alternative transport mechanism for communication between the DD Boost Library and the Data Domain system Fibre Channel.

Certain installations prefer or require the use of Fibre Channel as the media for data transfer between media servers and storage systems. The DD Boost-over-Fibre Channel transport (DD Boost-over-FC) allows such installations to access the features provided by the DD Boost technology.

Although Fibre Channel is specified as a general-purpose data transport mechanism, in practice Fibre Channel is used solely as a transport for SCSI device access. In standard host operating systems (e.g., Windows, Linux), Fibre Channel hardware and drivers reside solely within the SCSI protocol stacks. Therefore, the DD Boost-over-FC transport must use SCSI commands for all communication.

Under the DD Boost-over-FC solution, the Data Domain system advertises one or more SCSI devices, of type Processor. The media server operating system discovers these devices, and makes them available to applications through a generic SCSI mechanism (Linux: SCSI Generic driver; Windows: SCSI Pass-Through Interface).

To request access to a Data Domain system using the DD Boost-over-FC transport, the application specifies the Data Domain system using the special string DFC- server-name>, where is the DD Boost-over-FC server name configured for the Data Domain system. The DD Boost-over-FC Transport logic within the DD Boost Library examines the set of generic SCSI devices available on the media server and uses SCSI commands to identify a catalog of devices, which are paths to the specified Data Domain system.

Referencing this catalog, the DD Boost-over-FC Transport logic issues SCSI commands to the identified generic SCSI devices, to transfer DD Boost protocol requests and responses between the library and the Data Domain system.

Figure 3 SCSI Commands between Media Server and Data Domain system.

Setting up the DD Boost-over-FC service on the Data Domain system requires additional configuration steps. See Configuring DD Boost-over-FC Service on page 43 for details

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DD Boost-over-Fibre Channel Transport 25

Most DD Boost features are independent of transport. One notable exception is the DD Boost-over-IP Advanced Load Balancing and Link Failover feature, and its associated ifgroups. This feature is specific to the IP transport. For the DD Boost-over-FC transport, load balancing and link-level high availability is achieved through different means. See the section DD Boost Over Fibre Channel Path Management on page 32 for a description.

Note

The DD Boost-over-FC communication path applies only between the media server/DD Boost Library and the Data Domain system, and does not apply to communication between two Data Domain systems. For example, the Managed File Replication section of this document describes efficient replication of data from one Data Domain system to another, possibly over a WAN. As shown in the next figure, such communication is ALWAYS over a TCP/IP network, regardless of the communication path between the media server and the Data Domain systems.

Figure 4 Fibre Channel Communication Path

Distributed Segment Processing The distributed segment processing functionality of the DD Boost software distributes the deduplication process to avoid sending duplicate data to the Data Domain system.

Distributed segment processing provides the following benefits:

u Potentially lower network traffic generation because the DD Boost Library sends only unique data to a Data Domain system versus sending all of the data over the LAN or Fibre Channel link. The amount of saved network bandwidth depends on the redundant nature of the data being backed up. In general, the greater the redundancy in the data set, the greater the saved network bandwidth to the Data Domain system.

u With distributed segment processing the DD Boost Library does not cache any data on the application host in memory or to disk, so there are no persistency requirements on the application host. There is no extra memory footprint, but some extra processing power on the application host is required to determine if the data is present on the Data Domain system. Also, because only one file can be concurrently written to or read from each connection, in Backup Exec the number of connections must be the same as the number of active jobs.

u Allows use of existing bandwidth-limited infrastructure (1 GbE, 4 Gb FC) to achieve higher throughput than is physically possible over those links. The network bandwidth requirements are significantly reduced because only unique data is sent from the DD Boost Library to the Data Domain systems.

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26 Data Domain Boost for OpenStorage 2.6 Administration Guide

u Failed backups can potentially recover much faster. If a large backup fails in the middle or toward the end, the data already sent to the Data Domain system is not resent when the job is restarted by the application. This results in faster completion of the job on retry. The following data flow for a single-controller Data Domain system with the distributed segment processing option enabled shows how DD Boost Library breaks the data into segments, checks the Data Domain system for segments already stored on it, and sends only unique segments to the Data Domain system. The deduplication process is distributed between the DD Boost Library and the Data Domain system. The DD Boost Librarys data handling is transparent to the application. The DD Boost Library does not cache any data on the application host.

Figure 5 Distributed Segment Processing Enabled on a Single Node

The local compression algorithm used by the DD Boost Library is a system-wide configuration setting on the Data Domain system and cannot be configured using the DD Boost Library API. The default local compression algorithm is set to lz. Data Domain systems support lz, gzfast, and gz local compression algorithms.

Managed File Replication The DD Boost software enables applications to control the Data Domain Replicator software so that copies of data on one Data Domain system can be created on a second Data Domain system using the network-efficient Data Domain replication technology. Using this approach, the bandwidth required for replication is reduced by up to 99%. This dramatically reduces the time and WAN bandwidth needed to create multiple copies of backups for disk consolidation or disaster recovery purposes. Resource usage on the application servers is also reduced as they are no longer in the data path when duplicate copies of the backup are being created.

Because backup applications control replication of data between multiple Data Domain systems, they can provide backup administrators with a single point of management for tracking all backups and duplicate copies. This design allows backup administrators to create disaster recovery copies of their backups over the WAN using Data Domain Replicator software and keep track of all the copies in the backup applications catalog

DD Boost Features

Managed File Replication 27

for easy disaster recovery. This also enables applications to manage retention periods for various copies individually, resulting in a more flexible disaster-recovery deployment.

Leveraging network-efficient Data Domain replication, DD Boost eliminates the need for tape-based backup and recovery procedures at remote sites. Recovery from backup copies at the central site also becomes simplified because all copies are tracked in the backup applications catalog. Since tape is no longer required at the remote sites, it is entirely practical to deploy Data Domain systems with DD Boost software as the key foundational elements of a multi-site tape consolidation strategy.

Managed file replication jobs (AIR replication as well as targeted replication) are displayed as Src-repl jobs in the ddboost show connections column on the Data Domain system.

Note

Replication throttling should not be used when managed file is being used. Please see Knowledge Base article 86392 for more information.

The Data Domain policy of upgrade compatibility for replication is as follows:

u All maintenance and patch versions within a family are backward compatible. A family is identified by the first two digits of the release number, such as 5.2. For example, 5.2.0.0, 5.2.0.2, 5.2.1.0, and 5.2.2.0 are all backward compatible.

u Replication is backward compatible across two consecutive release families, such as 5.0 and 4.9, although only the current release within each family is fully tested.

u Replication requires two systems: the destination system (the target) and the source system. The destination must be running the same version as, or one version newer than, the source.

u Both source and destination Data Domain systems must be licensed for replication.

Low-Bandwidth Optimization The low-bandwidth Replicator option reduces the WAN bandwidth utilization. It is useful if managed file replication is being performed over a low-bandwidth network (WAN) link. This feature provides additional compression during data transfer and is recommended only for managed file replication jobs that occur over WAN links that have fewer than 6 Mb/s of available bandwidth.

The low-bandwidth optimization option is available to Data Domains systems with an installed Replicator license. The option is enabled on each Data Domain system and applies to all optimized duplication jobs on that system. Both the source and destination Data Domain systems must be configured with this setting to enable low-bandwidth optimization.

Enabling this option on a Data Domain system is transparent to the backup application. When the backup application requests a Data Domain system to perform a managed file replication job, the source and destination systems automatically perform the additional compression without involving the requesting backup application.

For more information about this topic, refer to the EMC Data Domain Operating System (DD OS) Administration Guide.

Encrypted Managed File Replication This option allows applications to encrypt the replication session between two Data Domain systems without requiring additional VPN configuration for securing the WAN connection. When a replication job is initiated between two Data Domain systems by the application using the managed file replication API, encrypted managed file replication

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uses SSL to encrypt the session between the source and destination Data Domain systems. All data and metadata is sent encrypted over the WAN.

Enabling this option on Data Domain system is transparent to a backup application. When the backup application requests the Data Domain system to perform a replication job, the source and destination systems negotiate automatically to perform encryption transparent to the requesting application. Encrypted file replication uses the ADH- AES256-SHA cipher suite.

Encrypted managed file replication is available to Data Domain systems with an installed Replicator license. The option is enabled on each Data Domain system and applies to all managed file replication jobs on that system. Both the source and the destination Data Domain systems participating in managed file replication jobs must have this option enabled.

Encrypted managed file replication can be used with the encryption of data-at-rest feature available on the DD OS with the optional Encryption license. When encrypted managed file replication is used with the encryption of data-at-rest feature, the encrypted backup image data is encrypted again using SSL for sending over WAN.

Note

u For more information about this topic, see the EMC Data Domain Operating System Administration Guide. Both the source and the destination Data Domain systems must be running DD OS 5.0 or later to use this feature. Enabling this feature does not require restarting the file system on a Data Domain system.

u The low-bandwidth optimization option and the encryption option can be used together.

Advanced Load Balancing and Link Failover

Note

This feature applies to the DD Boost-over-IP transport only.

Advanced load balancing and link failover allows combining multiple Ethernet links into a group and registering only one interface on the Data Domain system with the backup application. The DD Boost Library negotiates with the Data Domain system on the interface registered with the application to obtain the best interface to send data to the Data Domain system. Load balancing provides higher physical throughput to the Data Domain system compared to configuring the interfaces into a virtual interface using Ethernet-level aggregation.

The Data Domain system load balances the connections coming in from multiple backup application hosts on all interfaces in the group. Load balancing is transparent to the backup application and is handled by the DD Boost software. Because advanced load balancing and link failover works at the DD Boost software layer, it is seamless to the underlying network connectivity and supports physical and virtual interfaces. The data transfer is load-balanced based on the number of connections outstanding on the interfaces. Only connections for backup and restore jobs are load-balanced.

Note

The managed file replication connection between the Data Domain systems is not part of load balancing. A single IP address is used for the destination Data Domain system. EMC recommends excluding one interface from the ifgroup and reserving it for the managed file replication path between the source and destination Data Domain systems.

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Advanced Load Balancing and Link Failover 29

Figure 6 Advanced Load Balancing and Link Failover

Advanced load balancing and link failover can be used with other network layer aggregation and failover technologies. The sample configuration in the figure shows one possibility. The links connecting the media servers and the switch connecting the Data Domain system are configured for an aggregated failover mode. This configuration provides network failover functionality from end-to-end. Any of the available aggregation technologies can be used between the media server and the switch.

Advanced load balancing and link failover also works with other network layer functionality on Data Domain systems, including VLAN tagging and IP aliasing. This functionality allows additional flexibility in segregating traffic into multiple virtual networks, all of which run on the same physical links on the Data Domain system.

Note

See the EMC Data Domain Operating System (DD OS) Administration Guide for more information about how to configure VLAN tagging and IP aliasing on a Data Domain system.

Advanced load balancing and link failover provides the following benefits:

u Eliminates the need to register the Data Domain system on multiple interfaces with the application, which simplifies installation and configuration.

u Prior to DD OS 5.0, any in-process backup job handled by the interface that failed became a failed process that required a restart.

u Starting with DD OS 5.0, all in-process jobs to the failed interface are failed over transparently to healthy operational links. From the point of view of the backup application, the jobs continue uninterrupted.

u If one of the interfaces in the group goes down while the Data Domain system is still operational, the subsequent incoming backup jobs are routed to the available interfaces.

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u Backup and restore jobs are automatically load-balanced on multiple interfaces in the group, resulting in higher utilization of the links.

u The Advanced Load Balancing and Link Failover feature must be configured on Data Domain systems. The DD Boost Library APIs do not provide an ability to manage the functionality.

u The interfaces can be added to the group using an IP address only. See the EMC Data Domain Operating System (DD OS) Administration Guide for instructions.

u Advanced load balancing and link failover works with 1 GbE interfaces and 10 GbE interfaces in the same ifgroup. Combining interfaces of different speeds in a single ifgroup is allowed and is supported.

In DD OS release 5.2 with DD Boost plug-in 2.5 or higher, advanced load balancing on the Data Domain system network interfaces and failover from one failed network interface to an active network interface has been significantly improved.

An administrator can define multiple network interface groups (ifgroups) where load balancing and failover apply within an ifgroup . This increases the capability to support a media server that can reach only some of the Data Domain system interfaces.

This enhancement adds multiple groups to the single default ifgroup supported in previous releases. Load banancing and failover are implemented on a per ifgroup basis, except for the administrative IP. This enhancement is available for Single Node and DD Extended Retention systems.

Each ifgroup is composed of a list of interfaces and clients that belong to the ifgroup. Within an ifgroup all interfaces are reachable by all the clients for .

Each interface or client name may reside in only one ifgroup . However, by creating alias IPs the administrator can configure an interface with one IP address in one and another IP address for the same interface in another . Physical link speed does not affect interface assignments. An ifgroup may consist of mixed 10G and 1G interfaces.

When ifgroup is disabled, use the administered IP on the client for all connections, as was done in previous releases. GDA uses management IP for RSS connections.

Only backup and restore jobs reconnect on ifgroup IP for load balancing. All other jobs remain on the administered IP.

New CLI commands have been added under the ddboost ifgroup commands to support creation of groups.

Interfaces An ifgroup interface is a member of a single ifgroup and may consist of the IPv4 associated with:

u Physical interface such as eth0a u Virtual interface, created for link failover or link aggregation, such as veth1 u Virtual alias interface such as eth0a:2 or veth1:2 u Virtual vlan interface such as eth0a.1 or veth1.1 u Within an ifgroup , all interfaces must be on unique interfaces

(ethernet, virtual ethernet) to ensure failover in the event of network error.

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Interfaces 31

Clients An ifgroup client is a member of a single ifgroup and may consist of:

u A fully qualified domain name (FQDN) such as ddboost.datadomain.com

u Wild cards such as *.datadomain.com or *

u A short name for the client, such as ddboost.

DD Boost Over Fibre Channel Path Management The ifgroup-based Advanced Load Balancing and Link Failover mechanism described in the previous section is based on ethernet interfaces, and is not applicable to the Fibre Channel transport. Instead, a different path mechanism is provided for the DD Boost- over-FC solution.

The Data Domain system advertises one or more Processor-type SCSI devices to the media server, over one or more physical paths. The operating system discovers all devices through all available paths, and creates a generic SCSI device for each discovered device and path.

For example, consider the case where:

u Media server has 2 initiator HBA ports (A and B)

u Data Domain System has 2 FC target endpoints (C and D)

u Fibre Channel Fabric zoning is configured such that both initiator HBA ports can access both FC target endpoints

u Data Domain system is configured with a SCSI target access group containing: l Both FC target endpoints on the Data Domain System

l Both initiator HBA ports

l 4 devices (0, 1, 2, and 3)

Figure 7 DD Boost-over-FC Path Management Scenario

In this case, the media server operating system may discover up to 16 generic SCSI devices, one for each combination of initiator, target endpoint, and device number:

u /dev/sg11: (A, C, 0)

u /dev/sg12: (A, C, 1)

u /dev/sg13: (A, C, 2)

u /dev/sg14: (A, C, 3)

u /dev/sg15: (A, D, 0)

u /dev/sg16: (A, D, 1)

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u /dev/sg17: (A, D, 2)

u /dev/sg18: (A, D, 3)

u /dev/sg19: (B, C, 0)

u /dev/sg20: (B, C, 1)

u /dev/sg21: (B, C, 2)

u /dev/sg22: (B, C, 3)

u /dev/sg23: (B, D, 0)

u /dev/sg24: (B, D, 1)

u /dev/sg25: (B, D, 2)

u /dev/sg26: (B, D, 3)

When the application requests that the DD Boost Library establish a connection to the server, the DD Boost-over-FC Transport logic within the DD Boost Library uses SCSI requests to build a catalog of these 16 generic SCSI devices, which are paths to access the DD Boost-over-FC service on the desired Data Domain System. As part of establishing the connection to the server, the DD Boost-over-FC Transport logic provides to the server this catalog of paths.

Initial Path Selection The server maintains statistics on the DD Boost-over-FC traffic over the various target endpoints and known initiators. During the connection setup procedure, Path Management logic in the server consults these statistics, and selects the path to be used for this connection, based upon the following criteria:

u For Queue-Depth Constrained clients (see below), evenly distribute the connections across different paths

u Choose the least busy target endpoint

u Choose the least busy initiator from among paths to the selected target endpoint

Dynamic Re-Balancing The server periodically performs dynamic re-balancing. This involves consulting the statistics to look for situations where:

u For Queue-Depth Constrained clients (see below), connections are distributed unequally across available paths

u Workload across target endpoints is out of balance

u Workload across initiators is out of balance

If such a situation is discovered, the server may mark one or more connections for server- directed path migration. This is achieved by having the server request, during a future data transfer operation, that the DD Boost Library start using a different available path from the catalog for subsequent operations.

Client Path Failover The client may start using a different path because it is directed to do so by the server dynamic re-balancing logic. But the client may also decide, on its own, to start using a different available path. This happens if the client receives errors when using the connection's current path.

For example, assume the path catalog for a connection consists of 8 paths:

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Initial Path Selection 33

u /dev/sg21: (A, C, 0) u /dev/sg22: (A, C, 1) u /dev/sg23: (A, D, 0) u /dev/sg24: (A, D, 1) u /dev/sg25: (B, C, 0) u /dev/sg26: (B, C, 1) u /dev/sg27: (B, D, 0) u /dev/sg28: (B, D, 1)

and the server selects the (A, C, 0) path during initial path selection. The DFC transport logic in the DD Boost Library starts sending and receiving data for the connection, using SCSI commands to /dev/sg21.

Later, the link from target endpoint C to its switch becomes unavailable, due to cable pull or some hardware failure. Any subsequent SCSI request submitted by the DFC transport logic to /dev/sg21 will fail with an error code indicating that the SCSI request could not be delivered to the device.

In this case, the DFC transport logic looks in the catalog of devices, for a path with a different physical component; that is, a different combination of initiator and target endpoint. The SCSI request is retried on the selected path, and the process is repeated until a path is discovered over which the SCSI request can be successfully completed.

Queue-Depth Constraints For the purposes of the DD Boost-over-FC solution, the specific SCSI device over which a request is received is irrelevant. All SCSI devices are identical, destination objects for SCSI commands as required by the SCSI protocol. When processing a SCSI request, the server logic gives no consideration to the specific device on which the SCSI request arrived.

Why bother to allow for more than one device? Because certain client-side operating systems impose a restriction on the number of outstanding IO requests which can be conducted simultaneously over a given generic SCSI device. For example, the Windows SCSI Pass-Through Interface mechanism will only conduct 1 SCSI request at a time through each of its generic SCSI devices. This impacts the performance of the DD Boost- over FC solution, if multiple connections (e.g. backup jobs) are trying to use the same generic SCSI device.

Additionally, the Data Domain system also imposes a limit on the number of outstanding IO requests per advertised SCSI device. For performance reasons with larger workloads, multiple SCSI devices may need to be advertised on the Data Domain system.

We use the term queue-depth to describe the system-imposed limit on the number of simultaneous SCSI requests on a single device. Client systems (like Windows) whose queue depth is so low as to impact performance are considered queue-depth constrained.

Refer to Sizing DD Boost-over FC Device-Set on page 86 for guidance regarding how many devices to configure based on the workload, type of Data Domain system, and whether or not the client system is queue-depth constrained.

Virtual Synthetic Backups A synthetic full or synthetic cumulative incremental backup is a backup assembled from previous backups. Synthetic backups are generated from one previous, traditional full or synthetic full backup, and subsequent differential backups or a cumulative incremental backup. (A traditional full backup means a non-synthesized, full backup.) A client can

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use the synthesized backup to restore files and directories in the same way that a client restores from a traditional backup.

During a traditional full backup, all files are copied from the client to a media server and the resulting image set is sent to the DDR. The files are copied even though those files may not have changed since the last incremental or differential backup. During a synthetic full backup, the previous full backup and the subsequent incremental backups on the DDR are combined to form a new, full backup. The new, full synthetic backup is an accurate representation of the clients file system at the time of the most recent full backup.

Because processing takes place on the DDR under the direction of the media server instead of the client, virtual synthetic backups help to reduce the network traffic and client processing. Client files and backup image sets are transferred over the network only once. After the backup images are combined into a synthetic backup, the previous incremental and/or differential images can be expired.

The virtual synthetic full backup is a scalable solution for backing up remote offices with manageable data volumes and low levels of daily change. If the clients experience a high rate of daily change, the incremental or differential backups are too large. In this case, a virtual synthetic backup is no more helpful than a traditional full backup. To ensure good restore performance it is recommended that a traditional full backup be created every two months, presuming a normal weekly full and daily incremental backup policy.

The virtual synthetic full backup is the combination of the last full (synthetic or full) backup and all subsequent incremental backups. It is time stamped as occurring 1 second after the latest incremental. It does NOT include any changes to the backup selection since the latest incremental.

Note

u Virtual synthetics was disabled by default in DD OS 5.2 but beginning with DD OS 5.4 the default is enabled. Use 'ddboost option show' to display the current settings and 'ddboost option set virtual-synthetics enabled' to enable virtual-synthetics.

NetBackup 7.5.0.4 accelerator requires DD OS 5.4 as well as an Enterprise NetBackup license and an external types key file to be installed. In versions of NetBackup prior to 7.5.0.4, accelerator jobs may fail with a message such as:

"11/07/2012 11:58:35 - Critical bptm (pid=9739) A portion of data to be included from a previous backup (backupid = ostqa- linux2_1351870224, offset = 661288960, length = 36352) has incorrect checksum (calculated checksum from backup image faf2aff1392269d36db7dbcc211f3d97b3f526ed, expected checksum 2345ea1603b4cb4ae2c29e5f6a9353e7832faee6) ".

Storage Quotas Beginning with the 5.2 release of DD OS, users can now use quotas to provision Data Domain system storage limits, ensuring that dedicated portions of the Data Domain system are available as unique storage units. DD Boost storage-unit quota limits may be set or removed dynamically. Quotas may also be used to provision various DD Boost storage units with different logical sizes, enabling an administrative user to monitor the usage of a particular storage unit over time.

Please refer to the ddboost, quota, and mtree sections of the EMC Data Domain Operating System 5.3 Command Reference Guide for details on the quota feature, and commands pertaining to quota operations.

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Storage Quotas 35

Media Server Access Validation Configuring media server access validation for DD Boost limits access to the Data Domain system for DD Boost clients and removes dependency on the DNS. This feature enables a one time DD Boost authentication per connection. Connection authentication against the hostname is needed only until credentials are available. The list of clients can be updated at anytime without a restart requirement, thus eliminating access validation impact on jobs in progress.

Auto Image Replication Auto Image Replication (AIR) works by duplicating images to a remote master server domain. The AIR feature, introduced in NetBackup 7.6, addresses the site to site replication challenge by allowing Storage Lifecycle Policies (SLP) to duplicate selected images between NetBackup Master domains.

The primary purpose of AIR is to create off-site copies of mission critical backups to protect against site loss. It is not intended to extend the storage capacity of a backup domain by allowing backups to be stored in a separate domain; nor is it intended to provide for day to day restores of data. Due to WAN bandwidth restrictions between sites, typically only the most critical data should be chosen for duplication using AIR. Electronic off-siting in this manner allows the backup set to be duplicated to an off-site location as soon as the backup has completed at the primary site without the need for user intervention based on the configuration of the SLP. It also means that the duplicate copy is available at the disaster recovery site as soon as the duplication has completed.

In order to use AIR, suitable disk storage units must be configured in the source and target domains. The storage units are associated with each other using by management ddboost association commands configured on each Data Domain system.

The figure illustrates the following configuration:

The source Data Domain system (D1) provides the routing for the backup image copies to the target domain:

ddboost association create D1-SU-A replicate-to D2 D2-SU-B

The target Data Domain system (D2) provides for the authentication and event notification:

ddboost association create D2-SU-B replicate-from D1 D1-SU-A

Currently only one association for each storage-unit is supported. So only the single replicate scenario is supported, as shown in the figure below.

Figure 8 Auto Image Replication

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Auto Image Replication works by duplicating backups from a disk pool in the source domain to a disk pool in the target domain. The replication operation requires two SLPs, one in the source domain and one in the target domain, both of which must have the same name. The SLP in the source domain is associated with the backup policy and controls the writing of backup and the subsequent duplication to the target domain. The SLP in the target domain is not associated with a backup policy but is invoked by an alerting mechanism when a new image (duplicated from the source domain) is detected. This SLP runs the process to add the information about the backup to the target domain and can also be configured to duplicate the backup to other storage locations in the target domain.

An Auto Image Replication backup image is different than a normal NetBackup backup image because once the backup has completed, the image database information associated with the backup (the part of the NetBackup catalog that lists what the backup actually contains) is appended to the end of the backup image before it is duplicated to the target domain. When a new backup is detected in the target domain, this information is read from the backup and used to populate the target domains NetBackup catalog. This information only exists in the source domain copies and the initial copy in the target domain and is not included in any subsequent duplicate copies created in the target domain.

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38 Data Domain Boost for OpenStorage 2.6 Administration Guide

CHAPTER 4

DD Boost for OpenStorage Configuration

Note

Complete descriptions of commands used in this guide are provided in the EMC Data Domain Operating System (DD OS) Command Reference Guide.

This chapter covers the following topics:

u Configuring the Data Domain System.................................................................... 40 u Configuring a Media Server....................................................................................46

DD Boost for OpenStorage Configuration 39

Configuring the Data Domain System You need to create one or more storage units on each Data Domain system enabled for OpenStorage in a NetBackup or Backup Exec installation. In a NetBackup system, a storage unit corresponds to disk pools on the media server whereas in a Backup Exec system, it corresponds to a tape repository.

Note

The following procedures for configuring a Data Domain system apply to NetBackup and Backup Exec.

Creating Storage Units Procedure

1. On the Data Domain system, enter:

# ddboost storage-unit create storage-unit-name [quota-soft-limit n {MiB|GiB|TiB|PiB}] [quota-hard-limit n {MiB|GiB|TiB|PiB}]

A storage unit name must be unique on any given Data Domain system. However, the same storage unit name can be used on each Data Domain system.

See the section on quotas in the EMC Data Domain Operating System Command Reference Guide for details on new command options.

2. Repeat the above step for each Boost-enabled Data Domain system.

Configuring Quotas for Storage Units (Optional) The storage on a Data Domain system can be provisioned through optional quota limits for a storage-unit. Quota limits can be specified either at the time of creation of a storage- unit, or later through separate commands. For more information refer to the sections on quotas and ddboost in the EMC Data Domain Operating System Command Reference Guide.

Note

If quotas are enabled, some OpenStorage backup applications may report unintuitive sizes and capacities. A Knowledge Base article, Storage Unit Quota Display on NetBackup and Backup Exec (Document ID 85210), has been developed to explain this in more detail.

Procedure

1. To enable quota limits on the Data Domain system, enter:

# quota enable 2. To configure quota limits at the time of creation of a storage-unit, specify the quota-

soft-limit and quota-hard-limit values with the following command:

# ddboost storage-unit create storage-unit-name [quota-soft-limit n {MiB|GiB|TiB|PiB}] [quota-hard-limit n {MiB| GiB|TiB|PiB}]

3. To configure quota limits after a storage-unit has been created:

# quota set storage-units storage-unit-list {soft-limit n {MiB|GiB|TiB|PiB}} {hard-limit n {MiB|GiB|TiB|PiB}}

4. To verify the quota limits of a storage-unit:

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40 Data Domain Boost for OpenStorage 2.6 Administration Guide

# quota show storage-units storage-unit-list

Configuring Distributed Segment Processing The distributed segment processing option is configured on the Data Domain system and applies to all the media servers and the OST plug-ins installed on them.

The option can be configured using the following command:

# ddboost option set distributed-segment-processing {enabled | disabled}

Note

Enabling or disabling the distributed segment processing option does not require a restart of the Data Domain file system.

Distributed segment processing is supported with OST plug-in 2.2 or later communicating with a Data Domain system that is running DD OS 4.8 or later.

Distributed segment processing is enabled by default on a system initially installed with DD OS 5.2. If a system is upgraded from DD OS 5.1, 5.0.x or 4.9.x to DD OS 5.2, distributed segment processing is left in its previous state.

Configuring Advanced Load Balancing and Link Failover

Note

This feature applies only to DD Boost over IP.

If an interface group is configured, when the Data Domain system receives data from the media server clients, the data transfer is load balanced and distributed as separate jobs on the private network, providing higher input/output throughput, especially for customers who use multiple 1 GbE connections. See Configuring Advanced Load Balancing and Link Failover on page 41 for details.

To configure Advanced Load Balancing and Link Failover, create an interface group (ifgroup) on the Data Domain system by adding existing interfaces to the group and registering the Data Domain system with the backup application, as described below.

Procedure

1. Create the interface group: # ddboost ifgroup create group_name

Examples:

# ddboost ifgroup create external# ddboost ifgroup create lab10G

Note

The group-name default can be used without being created first. In all the remaining ddboot ifgroup commands, the default group is used if none is specified.

2. Add clients and interfaces to each ifgroup. The interfaces must already have been created with the net command.

# ddboost ifgroup external add interface ipaddr client host-name

Examples:

# ddboost ifgroup external add interface 10.6.109.140 client *.datadomain.com # ddboost ifgroup add interface 10.6.109.141 client *

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Configuring Distributed Segment Processing 41

3. Select one interface on the Data Domain system to register with the backup application. It is recommended that you create a failover aggregated interface and register that interface with the backup application.

Note

It is not mandatory to choose an interface from the ifgroup to register with the backup application. An interface that is not part of the ifgroup can also be used to register with the backup application. EMC recommends that the interface be registered with a resolvable name using DNS or any other name resolution mechanism. Using NetBackup and assuming that 192.168.1.1 is named dd22.abc.com, execute the following command on the media server:

nbdevconfig -creatests -st 9 -stype DataDomain -storage_server dd22.abc.com -media_server load64

Note

The interface registered with the backup application is used by the backup application and its OST plug-in to communicate with the Data Domain system. If this interface is not available, then backups to that Data Domain system are not possible.

4. Once an interface and client are configured, the group is automatically enabled. Check the state of the ifgroup, enabled or disabled:

# ddboost ifgroup enable status group-name Status of ifgroup default is enabled

5. Verify the entire configuration of all the groups with interfaces and clients:

# ddboost ifgroup show config all

Results

Sample output is displayed in the following table.

Group Name Status Interfaces Clients Count Count ------------------------------------------------------------------- default enabled 2 1 external enabled 2 1 lab10G enabled 2 2 ------------------------------------------------------------------- Group Name Status Interfaces ------------------------------------------------------------ default enabled 10.6.109.141 default enabled 10.6.109.41 external enabled 10.6.109.140 external enabled 10.6.109.142 lab10G enabled 192.168.1.220 lab10G enabled 192.168.1.221 ------------------------------------------------------------------- Group Name Status Clients ------------------------------------------------------------ default enabled * external enabled *.datadomain.com lab10G enabled ddboost-dl.datadomain.com lab10G enabled yellowmedia.datadomain.com ------------------------------------------------------------

After you finish

After an interface group is set up, you can add or delete interfaces from the group. See Modifying an Interface Group on page 84.

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To disable an ifgroup, force all clients on the group to stop using the ifgroup interfaces with the command:

# ddboost ifgroup group-name disable

Example:

# ddboost ifgroup external disable

This action will force all clients *.datadomain.com to use non-ifgroup interfaces.

To move clients *.datadomain to another group, first delete them from the current group then add them to a new group.

Delete clients *.datadomain with the command:

# ddboost ifgroup delete group-name interface ip-addr client host

Example:

# ddboost ifgroup delete external client *.datadomain.com

Add clients *.datadomain to a new group with the command:

# ddboost ifgroup add group-name interface ip-addr client host

To remove all configuration for a group:

# ddboost ifgroup reset group-name

Example:

# ddboost ifgroup reset external

This will remove all clients and interfaces and leave the group disabled.

When group is no longer needed, use the destroy option to remove the group from the configuration:

# ddboost ifgroup destroy group-name

Example:

# ddboost ifgroup destroy external.

Clients are matched to a group by their host name independent of the group status (enabled/disabled). Therefore, disabling a group will not force a client to use a different group. When a client is found in a disabled group, it will use the registered interface and stay on the original connection.

Note

You can also manage Advanced Load Balancing and Link Failover (an interface group) from the Enterprise Manager Data Management DD Boost view. (See the EMC Data Domain Operating System Administration Guide).

Configuring DD Boost-over-FC Service In order to support the DD Boost-over-FC service, it is necessary to install supported Fibre Channel Target HBAs into the system. (See also the EMC Data Domain Operating System Command Reference Guide and Administration Guide for information about scsitarget as a related command that may be helpful in managing the SCSI target subsystem.)

The following additional configuration steps are also required:

Procedure

1. Enable the DD Boost-over-FC service:

# ddboost option set fc enabled

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2. Optional: set the DFC-server-name:

# ddboost fc dfc-server-name set

Or accept the default, which is the base hostname of the Data Domain system. A valid dfs-server-name consists of one or more of the following characters:

l lower-case letters (az)

l upper-case letters (AZ)

l digits (09)

l underscore (_)

l dash ()

Note that the dot or period character (.) is not valid within a dfc-server-name; this precludes using the fully-qualified domain name of a Data Domain system as its dfc- server-name.

3. Create a SCSI target access group:

# ddboost fc group create

Example:

# ddboost fc group create lab_group 4. Configure the device set of the SCSI target access group:

# ddboost fc group modify device-set count endpoint {all | none | }

Example:

# ddboost fc group modify lab_group device-set count 8 endpoint all

Example:

# ddboost fc group add lab_group initiator "initiator-15,initiator-16"

5. Add initiators to the SCSI target access group:

# ddboost fc group add initiator

Throttling Managed File Replication If managed file replication is being used, replication throttling should be disabled. If throttling must be used, the workaround is to set the throttle manually with /ddr/bin/ repl_throttle destination port rate command. Contact engineering if this is required.

Enabling Low-Bandwidth Optimization To enable the low-bandwidth option for managed file replication, enter:

# ddboost file-replication option set low-bw-optim enabledLow bandwidth optimization enabled for optimized duplication.

Note

Enabling or disabling the low-bandwidth optimization option does not require a restart of the Data Domain file system. However, after enabling low-bandwidth optimization, you need to run a full cleaning cycle on the Data Domain system for it to be effective.

Low-bandwidth optimization can also be monitored and managed from the Enterprise Manager Data Management DD Boost view. (See the EMC Data Domain Operating System (DD OS) 5.4 Administration Guide.)

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No configuration changes are necessary on the media server as this feature is transparent to the backup applications.

Note

u Enabling this feature takes additional resources (CPU and memory) on the Data Domain system, so it is recommended that this option be used only when managed file replication is being done over low-bandwidth networks with less than 6 Mbps aggregate bandwidth.

u The low-bandwidth option for managed file replication is supported only for standalone Data Domain systems.

u Low-bandwidth optimization is not supported on Data Domain Extended Retention systems.

Enabling Encrypted Managed File Replication To enable the encrypted managed file replication option, enter:

# ddboost file-replication option set encryption enabled

The output indicates that the encryption you requested was enabled.

No configuration changes are necessary on the media server as this feature is transparent to the backup applications NetBackup and Backup Exec. Turning on this feature takes additional resources (CPU and memory) on Data Domain system.

Changing the Managed File Replication TCP Port

Note

Changing the managed file replication TCP port requires a restart of the Data Domain file system. Therefore it should be a planned event.

To change the Replication TCP port from the default of 2051 to port-number, enter the following commands on both the source and destination Data Domain systems:

# replication option set listen-port port-number# filesys restart

Note

Managed file replication and directory replication both use listen-port option. Managed file replication uses the replication option set listen-port command on both the source and destination to specify the port on which the destination listens and the port on which the source connects. Directory replication uses the listen-port option to specify only the replication destination server listen-port. On the replication source, the connection port for a specific destination is entered using the replication modify command. u For more information on these topics, see the EMC Data Domain Operating System

Command Reference Guide.

Configuring Media Server Access Validation Configuring media server client access control for DD Boost limits access to the DDR for DD Boost clients and removes dependency on the DNS. By default, if no clients are added

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to the access list when DD Boost is enabled, all clients will be automatically included in the access list. By default a * wildcard is used.

To restrict access, remove the * wildcard from the list and add individual clients.

The media server client list may contain both fully qualified domain names or short names. The client name must match the hostname on the media host and is case- sensitive.

To delete all clients (wildcard setting) from the DD Boost access list, enter:

# ddboost access del clients *

Optionally, to delete all clients previously added and reset the DD Boost access list, enter:

# ddboost access reset

Clients can be added as both fully qualified domain names and short names. To add clients to the DD Boost access list, enter:

# ddboost access add clients

Example:

# ddboost access add clients ddboost-dl.emc.com ddboost-dlddboost- dl.emc.com : Addedddboost-dl : Added

To view the DD Boost client access list, enter:

# ddboost access show

During access validation, the following search order is used to restrict access:

u Wild card * followed by partial, for example, *.emc.com followed by *.com u Perfect match of sent client name, for example, ddboost-dl.emc.com If the search is not found, the client will be denied access.

Configuring a Media Server Media server configuration depends on the backup application being used. See the appropriate configuration section.

NetBackup Configuration

Note

The examples in this chapter assume the following configuration: u A media server with the name load64 that runs NBU 7.x

u Two Data Domain systems with DD Boost enabled named dd22 and dd100.

Media server configuration consists of the following procedures:

u Registering each Data Domain system

u Adding credentials for each media server that is to communicate with a Data Domain system

u Creating disk pools

u Creating storage units, which are collections of disk pools

u Setting backup policies

To avoid the need for frequent DNS lookups, add every media server host/IP address to the Data Domain system using the command:

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# net hosts add ipaddr {host | "alias host"}

DNS reverse lookup has been added for every media server accessing the Data Domain system as of DD OS 4.6.3.

To avoid DNS lookup for every job, also add the Data Domain system IP address into the media servers /etc/hosts file.

Note

Commands that run on the command line can be entered on either the master or the media server. If you run commands from the master server, use the -media_server option to tell NBU where to direct the operation that queries the plug-in about the storage servers properties.

Concurrent Connection Limit With NetBackup and Backup Exec, the default number of concurrent connections (jobs) from a single media server is 64. To increase this number, contact your EMC technical consultant.

Registering Each Data Domain System Procedure

1. On the media server, start the backup applications services. See NetBackup Services on page 18.

2. Verify that the plug-in is detected by the backup application by entering:

# bpstsinfo -pi

The output shows:

l the vendor version, which is the plug-in version

l the build version, which is the OST plug-in version.

3. Before registering a Data Domain system, enable virtual synthetics if that feature is planned to be used, by entering:

# ddboost option set virtual-synthetics enabled 4. Register a Data Domain system by entering:

For DD Boost-over-IP:

# nbdevconfig -creatests -stype DataDomain -storage_server dd22 - media_server load64

In this case, the storage_server can be either an IP address or a hostname, such as dd22.

For DD Boost-over-FC:

# nbdevconfig -creatests -stype DataDomain -storage_server DFC- dd100 -media_server load64

In this case, the storage_server prefix DFC- indicates the desire to use the DDBoost- over-FC transport to communicate with the Data Domain system. The name following the prefix is the DFC-server-name of the desired Data Domain system, such as dd100.

5. Repeat the above procedure for each Data Domain system that will be running DD Boost.

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Adding Credentials Procedure

1. On a media server that is to communicate with a Data Domain system, enter:

# tpconfig -add -storage_server dd22 -stype DataDomain -sts_user_id username -password password

Note

NetBackup 7 allows the credentials to also be configured from within NetBackup. See the NetBackup documentation for more information.

2. Repeat the above step for each media server that is to communicate with a specific Data Domain system. The following is an example for DFC server using dd100:

# tpconfig -add -storage_server DFC-dd100 -stype DataDomain -sts_user_id username - password password

Results

After you add the credentials, the backup application does the following:

u Saves the credentials so the media server can log into the Data Domain system.

u Configures the media server as a data mover that can transfer data between the primary storage (the backup applications client) and the storage server (the Data Domain system). The backup application maintains an access path between the media server and the storage server.

Creating Disk Pools Disk pools are collections of disk volumes that the backup application administers as single entities. Disk pools correspond to storage units.

Note

Each disk pool requires a unique name.

The backup application provides a command line interface (CLI) and a graphical user interface (GUI). You can use either to create disk pools.

Create a disk pool using the CLI

Procedure

1. The backup applications Remote Manager and Monitor Service (nbrmms) must be running. To start it, enter:

# nbrmms 2. Obtain the identity of the storage unit on the Data Domain system (dd22) by entering:

# nbdevconfig -previewdv -storage_server dd22-stype DataDomain > /tmp/dvlist

3. Create a disk pool using the information obtained from the previous command by entering:

# nbdevconfig -createdp -dp dd22_storage-unit1_dp -stype DataDomain -storage_servers dd22 -dvlist /tmp/dvlist

The disk pool name must be unique.

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Output similar to the following is displayed:

Disk pool dd22_storage-unit1_dp has been successfully created with 1 volume.

Create a Disk Pool using the GUI

Procedure

1. Open the NetBackup Administration Consoles Devices window.

2. In left pane of this window, expand the Media and Device Management node. Expand the Devices node. Right-click Disk Pools. Select New Disk Pool from the menu.

3. The Disk Pool Configuration Wizard displays. Select the Data Domain system from the Storage server list, and click Next.

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4. Select (check) the storage unit in the Volume Name list, and click Next.

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5. In the Disk Pool Properties window, enter a unique name for the disk pool in the Disk Pool name text box. Click Next.

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6. After creating the disk pool, you are given the option of continuing to use the GUI to create a storage unit, which is a collection of disk pools. For instructions, see Creating Storage Units on page 52.

Creating Storage Units A storage unit contains a disk pool. Multiple storage units can be grouped together into a Storage Unit Group. You can create storage units using either the CLI or the GUI.

Note

Each storage unit requires a unique name.

Create storage units using the CLI

Procedure

1. Enter a command similar to the following:

# bpstuadd -label dd22_storage-unit1_su -dp dd22_storage-unit1_dp -host load64a -M load64a

Note

There is no output from this command.

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Create Storage Units Using the GUI

Procedure

1. Open the NetBackup Administration Consoles Storage window.

2. In the left pane, expand the NetBackup Management node. Under the Storage node, right-click Storage Units, and select New Storage Unit from the menu.

3. In the New Storage Unit dialog box, enter a unique name for the new storage unit.

4. For the Storage unit type, select Disk from the list.

5. For the Disk type, select OpenStorage (DataDomain) from the list.

6. For the Disk Pool, select the desired disk pool from the list.

7. Select the media servers that can access this storage unit.

l If any media server is allowed to access the storage unit, select Use any available media server.

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l If a storage unit needs to be visible to a select set of media servers, select (check) the name of each in the Media Servers list.

Note

If a server does not appear in the list, verify that its OST plug-in has been installed and that its login credentials have been configured.

8. Click OK.

Creating a Backup Policy For instructions on creating a backup policy, see the Symantec NetBackup Administration Guide.

Configuring Buffers You can set the number and size of various buffers, but you cannot change their size limits. The location for these files depends on your operating system.

u The UNIX file location is /usr/openv/netbackup.

u The Windows file location is install_path\netbackup\db\config.

For best performance, set SIZE_DATA_BUFFERS and SIZE_DATA_BUFFERS_DISK to 262144.

To set the number and size of buffers, create the following files, as appropriate for your operating system.

u NET_BUFFER_SZ l Description: TCP/IP socket buffer size

l Media: N/A

l Default on UNIX: 32,032

l Default on Windows: 32,032

u NUMBER_DATA_BUFFERS

Note

The number must be a power of two.

l Description: Number of shared data buffers.

l Media: Tape

l Default on UNIX: 8/4 (Non-multiplexed/multiplexed.)

l Default on Windows: 16/8 (Non-multiplexed/multiplexed.)

u NUMBER_DATA_BUFFERS_RESTORE l Description: Number of shared data buffers.

l Media: Tape

l Default on UNIX: 8/12 (Non-multiplexed/multiplexed.)

l Default on Windows: 16/12 (Non-multiplexed/multiplexed.)

u NUMBER_DATA_BUFFERS_DISK

Note

The number must be a power of two.

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l Description: Number of shared data buffers.

l Media: Disk

l Default on UNIX: 8/4 (Non-multiplexed/multiplexed.)

l Default on Windows: 16/8 (Non-multiplexed/multiplexed.)

u SIZE_DATA_BUFFERS

Note

The size must be a multiple of 32 KB. The default used when this file does not exist is 32 KB. The maximum value supported by the Data Domain plug-in is 1 MB. The default value when the file exists, and the recommended value for best performance is 256 KB.

l Description: Size of shared data buffers.

l Media: Tape

l Default on UNIX: 64 KB

l Default on Windows: 64 KB

u SIZE_DATA_BUFFERS_DISK

Note

The size must be a multiple of 32 KB.The default used when this file does not exist is 32 KB. The maximum value supported by the Data Domain plug-in is 1 MB. The default value when the file exists, and the recommended value for best performance is 256 KB.

l Description: Size of shared data buffers.

l Media: Disk

l Default on UNIX: 256 KB

l Default on Windows: 256 KB

u SIZE_DATA_BUFFERS_NDMP l Description: Buffer size for NDMP backups.

l Media: N/A

l Default on UNIX: 63 KB

l Default on Windows: 63 KB

Configuring Optimized Duplication The OST plug-in enables a NetBackup media server to specify a duplication process and delegate its execution to the Data Domain system. This sharing has the following advantages:

u The backup application system retains control of creating and duplicating backup files and keeps track of all copies in its catalog, which ensures easy and efficient recovery.

u Optimized duplication removes the media server from the data path in creating duplicate copies of backup images, which reduces the load on the backup application system and frees it for other work.

u The Data Domain system uses Wide Area Network (WAN) efficient replication process for deduplicated data. The process is optimized for WANs, which reduces the overall load on the WAN bandwidth required for creating a duplicate copy.

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u Data Domain Replicator software features, such as the Low-Bandwidth Optimization Option, can be used transparent to the backup application to reduce further the data sent over WAN links that are fewer than 6 Mb/s.

u Data Domain Replicator software features, such as Encrypted Optimized Duplication, are transparent to the backup applications. This feature allows all data that is sent over the WAN for the purpose of creating duplicate copies to be encrypted, which provides higher security.

EMC recommends that you add the destination Data Domain systems IP address to the source Data Domain system using the net hosts add ipaddr {host | "alias host"}... command.

Note

All media servers, source and destination, must have permission to access both Data Domain systems. EMC recommends that you add all of the media servers that need to access a Data Domain system to it using the net hosts add command.

DD Boost-Over-Fibre Channel Considerations DD Boost-over-FC introduces a complication to the procedure for configuring optimized duplication.

An optimized duplication operation requires communication between three systems:

u Media_Server

u Src_DD_System The source Data Domain system

u Dst_DD_System The destination Data Domain system

During an optimized duplication operation, the Dst_DD_System is accessed by both of the other systems:

u By Media_Server for control operation/setup

u By Src_DD_System for data transfer

The Media_Server-to-Dst_DD_System communication may use either of the following transports:

u DD Boost-over-IP

u DD Boost-over-FC

But the Src_DD_System-to-Dst_DD_System communication is always via IP networking.

Now, consider the case where the Media_Server uses DD Boost-over-FC to communicate with the Dst_DD_System. The full optimized duplication operation now requires two "names" for the Dst_DD_System:

u DFC- -- needed by DD Boost Library on the Media_Server

u IP hostname -- needed by the Src_DD_System

However, during configuration, only a single name for Dst_DD_System is presented to the DD Boost Library: the DFC-style name, DFC- .

The DD Boost Library has to pass a name to the Src_DD_System as part of the request to start transferring the data.

The Src_DD_System needs an IP hostname for the Dst_DD_System, since all communication between the two Data Domain systems is performed using IP networking.

But the DD Boost Library knows the Dst_DD_System only by its DFC-style name. So, what name for the Dst_DD_System should the DD Boost Library present to the Src_DD_System?

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The answer is that the DD Boost Library just strips off the DFC- prefix, and presents the Dst_DD_Systems DFC-server-name to the Src_DD_System.

For example:

Media Server: clientA Src_DD_System: DFC-ddr1 Dst_DD_System: DFC-ddr2

In this case, the DD Boost Library will present to the Src_DD_System the name ddr2 as the Dst_DD_System.

This works naturally if Dst_DD_System's DFC-server-name is the same as its IP hostname, as known to Src_DD_System. This is the expected normal situation, since the default DFC- server-name for a Data Domain system is its simple nodename.

If the user has changed Dst_DD_Systems DFC-server-name to something else (e.g., my- ddr-via-dfc), then he needs to make sure that when Src_DD_System performs a hostname lookup of my-ddr-via-dfc, it finds an IP address by which Dst_DD_System is reachable. This can be achieved by adding an entry to the /etc/hosts file on Src_DD_System.

Using Storage Lifecycle Policies to Automate Optimized Duplication A storage lifecycle policy consists of a list of destinations for backup files and a retention period for each file. A lifecycle process creates, retains, and finally expires the files. Using storage lifecycle policies allows you to specify different retention periods for the initial backup and for the duplicate copies. For example, you might specify one retention period for the original local backup and another for a duplicate at a disaster recovery site.

Note

u If there is a preferred link or IP address for sending the optimized duplication data between two Data Domain storage servers, use that link or address when creating the destination storage server.

u Should you ever want to start optimized duplication manually, use the NBU CLI command bpduplicate, which is described in the Symantec NetBackup documentation.

Create a Storage Lifecycle Policy

This example creates a lifecycle policy that backs up to a DD Boost-enabled Data Domain system and then creates a duplicate copy on another DD Boost-enabled Data Domain system. There are two storage destinations. The first serves as backup to the first DD Boost-enabled Data Domain system. The second storage destination is used for duplication to the second DD Boost-enabled Data Domain system.

Procedure

1. Open the NetBackup Administration Consoles Storage window.

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2. In left pane of the window, expand the NetBackup Management node and then the Storage node. Right-click Storage Lifecycle Policies. Select New Storage Lifecycle Policy from the menu.

3. In the New Storage Lifecycle Policy dialog box, enter a lifecycle policy name in the Storage lifecycle policy name text box.

4. Click the Add button to add a new storage destination to the list.

5. In the New Destination dialog box, select either Backup or Duplication, depending on how the policy is to be used. In this example, select Backup.

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6. Select the storage unit (dd22_storage-unit1_su) from the list.

7. Select one of the retention types:

l Fixed Fixed retention means that the backup is retained for a specific period of time. Afterwards, NetBackup deletes information about the expired backup, and the files in the backup become unavailable to restore operations. Fixed retention enables you to use different retention periods for backup copies on local and remote Data Domain systems. For example, you might retain backups at the local Data Domain system for one week and the copies at a remote disaster recovery Data Domain system for four weeks.

l Staged capacity managed This type means that the Data Domain system serves as a staging device before it is duplicated to a final destination. The Data Domain system must be configured to use disk staging.

l Expire after duplication This type applies only to backup destinations, not to duplication destinations. As soon as NetBackup duplicates the backup, NetBackup deletes information about the backup and the files in the backup become unavailable to restore operation.

8. Click OK in the New Destination dialog box.

9. Return to the New Storage Lifestyle Policy dialog box.

10.Click the Add button.

11.In the New Destination dialog box, select a different storage unit for Duplication. Click OK, which adds it to the list in the New Storage Lifecycle Policy dialog box.

12.Click OK.

Note

NetBackup supports Hierarchical Duplication, which allows creation of up to ten duplicate copies using Storage Lifecycle Policies. Policies can be defined such that the third copy can be sourced from the second copy, which is the first duplicate copy. See the NetBackup documentation for more information.

Configuring a Virtual Synthetic Backup

To use virtual synthetic backups, set up the policy attributes and schedules as follows:

Procedure

1. Virtual Synthetics is disabled by default. Enable a virtual synthetic backup on the Data Domain system by entering:

# ddboost option set virtual-synthetics {enable | disable}

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2. Verify that NetBackup has enabled virtual synthetics on the Data Domain system and verify that the OptimizedImage flag is set by entering:

# nbdevquery -liststs -U

If the OptimizedImage flag is not displayed in the output, configure it with the nbdevconfig command:

# nbdevconfig -changests 3. Configure NetBackup policy attributes and schedule details.

In the Change Schedule window:

l Add a new schedule with a user-specified name.

l Check Synthetic backup.

4. In the Change Policy window:

l Add a new schedule with a user specified name.

l Uncheck Bare Metal Restore.

l Check Collect true image restore information.

l Check with move detection.

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Note

To ensure good restore performance it is recommended that a traditional full backup be created every two months, presuming a normal weekly full and daily incremental backup policy.

Sample Backup Operations The following examples show the commands to initiate backups and display various types of backups.

Sample Backup Operation: Full Backup A full backup will consist of a header (HDR) image file, one or more fragment (F1) image files and a true image restore (TIR) image file as can be seen on the DDR storage unit.

# ddboost storage-unit show sparc1 compression List of files in sparc1 and their compression info: rtp-ost-sparc1.datadomain.com_1309959523_C1_HDR: 1309959523:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 8.9 Original Bytes: 8,924 Globally Compressed: 8,924 Locally Compressed: 767 Meta-data: 236

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rtp-ost- sparc1.datadomain.com_1309959523_C1_F1:1309959523:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 1.0 Original Bytes: 931,228,244 Globally Compressed: 927,741,488 Locally Compressed: 942,139,003 Meta-data: 3,091,380 rtp-ost-sparc1.datadomain.com_1309959523_C1_TIR: 1309959523:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 43.9 Original Bytes: 100,349 Globally Compressed: 54,304 Locally Compressed: 1,912 Meta-data: 376

Sample Backup Operation: Incremental Backup An Incremental backup will add a header (HDR) image file, one or more fragment (F1) image files and a true image restore (TIR) image file as can be seen on the DDR storage unit as shown in bold below.

# ddboost storage-unit show sparc1 compression List of files in sparc1 and their compression info: rtp-ost-sparc1.datadomain.com_1309959523_C1_HDR: 1309959523:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 8.9 Original Bytes: 8,924 Globally Compressed: 8,924 Locally Compressed: 767 Meta-data: 236 rtp-ost- sparc1.datadomain.com_1309959523_C1_F1:1309959523:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 1.0 Original Bytes: 931,228,244 Globally Compressed: 927,741,488 Locally Compressed: 942,139,003 Meta-data: 3,091,380 rtp-ost-sparc1.datadomain.com_1309959523_C1_TIR: 1309959523:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 43.9 Original Bytes: 100,349 Globally Compressed: 54,304 Locally Compressed: 1,912 Meta-data: 376 rtp-ost-sparc1.datadomain.com_1309959822_C1_HDR: 1309959822:dd670c2-1:4:0::: Total files: 1; bytes/storage_used: 8.8 Original Bytes: 8,924 Globally Compressed: 8,924 Locally Compressed: 776 Meta-data: 236 rtp-ost- sparc1.datadomain.com_1309959822_C1_F1:1309959822:dd670c2-1:4:0::: Total files: 1; bytes/storage_used: 93.9 Original Bytes: 931,227,936 Globally Compressed: 9,784,959 Locally Compressed: 9,890,654 Meta-data: 28,684 rtp-ost-sparc1.datadomain.com_1309959822_C1_TIR: 1309959822:dd670c2-1:4:0::: Total files: 1; bytes/storage_used: 39.3 Original Bytes: 100,528 Globally Compressed: 66,592 Locally Compressed: 2,151 Meta-data: 404

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Sample Backup Operation: Synthetic Full Backup The synthetic full will add a header (HDR) image file, one or more fragment (F1) image files and a true image restore (TIR) image file as can be seen on the DDR storage unit as shown in bold below.

# ddboost storage-unit show sparc1 compression List of files in sparc1 and their compression info: rtp-ost-sparc1.datadomain.com_1309959523_C1_HDR: 1309959523:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 8.9 Original Bytes: 8,924 Globally Compressed: 8,924 Locally Compressed: 767 Meta-data: 236 rtp-ost- sparc1.datadomain.com_1309959523_C1_F1:1309959523:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 1.0 Original Bytes: 931,228,244 Globally Compressed: 927,741,488 Locally Compressed: 942,139,003 Meta-data: 3,091,380 rtp-ost-sparc1.datadomain.com_1309959523_C1_TIR: 1309959523:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 43.9 Original Bytes: 100,349 Globally Compressed: 54,304 Locally Compressed: 1,912 Meta-data: 376 rtp-ost-sparc1.datadomain.com_1309959822_C1_HDR: 1309959822:dd670c2-1:4:0::: Total files: 1; bytes/storage_used: 8.8 Original Bytes: 8,924 Globally Compressed: 8,924 Locally Compressed: 776 Meta-data: 236 rtp-ost- sparc1.datadomain.com_1309959822_C1_F1:1309959822:dd670c2-1:4:0::: Total files: 1; bytes/storage_used: 93.9 Original Bytes: 931,227,936 Globally Compressed: 9,784,959 Locally Compressed: 9,890,654 Meta-data: 28,684 rtp-ost-sparc1.datadomain.com_1309959822_C1_TIR: 1309959822:dd670c2-1:4:0::: Total files: 1; bytes/storage_used: 39.3 Original Bytes: 100,528 Globally Compressed: 66,592 Locally Compressed: 2,151 Meta-data: 404 rtp-ost-sparc1.datadomain.com_1309959823_C1_HDR: 1309959823:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 8.9 Original Bytes: 8,924 Globally Compressed: 8,924 Locally Compressed: 768 Meta-data: 236 rtp-ost- sparc1.datadomain.com_1309959823_C1_F1:1309959823:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 1.0 Original Bytes: 7,435,452 Globally Compressed: 7,420,935 Locally Compressed: 7,444,262 Meta-data: 23,812 rtp-ost-sparc1.datadomain.com_1309959823_C1_TIR: 1309959823:dd670c2-1:4:1::: Total files: 1; bytes/storage_used: 43.0 Original Bytes: 100,449 Globally Compressed: 54,304

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Locally Compressed: 1,958 Meta-data: 376

The synthetic backup is done using the DDP_SYNWR API which can be displayed on the Data Domain system by the ddboost show stats and ddboost show histograms commands.

# ddboost show stats 07/06 07:13:38 DD Boost statistics: ... DDP_SYNWR : 18 [0] ... Count Errors ----------------------------- ------------- ------ Image creates 9 0 Image deletes 0 0 Pre-compressed bytes received 3,712,802,816 - Bytes after filtering 1,856,586,752 - Bytes after local compression 1,856,586,752 - Network bytes received 1,857,697,928 - Compression ratio 2.0 - Total bytes read 0 0 ----------------------------- ------------- ------

Configuring an Auto Image Replication Backup in a Source Domain Backups must be directed to a disk pool that has a Source Replication property as shown for Volume Name (storage-unit on the Data Domain system) test1 in the screenshot below.

A Storage Lifecycle Policy (e.g., AIR-test1-test2) is created. It contains a standard Backup step and a Duplication (NBU 7.1) step specifying Remote master (send to the replication target device in a remote domain) as shown in the screenshot below.

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On NBU 7.5, the operation is called Replication as shown below:

A policy is created specifying the SLP as its policy storage, as shown in the screenshot below.

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Configuring an Auto Image Replication Backup in a Target Domain Backups to be automatically imported must be file-copied to a disk pool that has a Destination Replication property, as shown for Volume Name (storage-unit on the Data Domain system) test2 in the screenshot below.

A Storage Lifecycle Policy (e.g., AIR-test1-test2) named identically to the one in the Source domain is created. It contains an import step as shown in the screenshot below.

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On NBU 7.6, a typical import operation is:

Running an Auto Image Replication Backup When an Auto Image Replication backup runs in the Source domain, there is a backup step followed in time (by default, 30 minutes later) by a duplication step, as shown below.

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AIR replication job count will be displayed as a Src-repl job in the output of a ddboost show connections command, the same as other NetBackup and Backup Exec optimized duplication jobs.

After the duplication in the Source domain, at some time later (again by default, 30 minutes), the imported image-set is available as shown in the Activity Monitor of the Target domain as shown in the screenshot below taken from the Target domain.

Unlike other NetBackup and Backup Exec optimized duplication jobs, AIR replication jobs will not be displayed as a Dst-repl job in ddboost show connections.

Backup Exec Configuration

Note

DD Boost-over-Fibre Channel is not supported with Backup Exec.

When you launch the Backup Exec application, its Home page is displayed. This page guides you through the configuration procedures. It provides links to Backup Exec technical support and documentation, as well as an alerts and job history summaries.

Note

For information on setting up, scheduling, and monitoring jobs, see the Symantec Backup Exec 2010 Administrators Guide or Symantec Backup Exec 2012 Administration Guide.

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Figure 9 Backup Exec Home Page

Complete these Getting Started steps (as shown in the upper-left of the home page):

Procedure

1. Create a logon account.

2. Configure devices.

Note

l Click the icon to the left of the task to launch a wizard or assistant that guides you through the configuration step.

l A green check to the left of a task indicates that a task has been completed.

Create a Logon Account

Follow these steps to create a logon account.

Procedure

1. Double-click the icon to the left of 1) Create Logon Accounts in the Getting Started panel of the Home page. The Logon Account Wizard Welcome dialog box is displayed. Click Next.

2. In the Set Up a Logon Account dialog box, select Add a new logon account, and click Next.

3. In the Enter Logon Account Credentials dialog box, enter the user name and password set for DD Boost. Click Next.

4. In the Logon Account Name dialog box, type an account name that describes this logon account. Click Next..

5. In the Type of Logon Account dialog box, make the account available to all Backup Exec users. Click Next.

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6. In the Default Logon Account dialog box, select No. The Data Domain system account is usually not the Backup Exec system logon. Click Next.

7. Verify your account settings as shown in the Logon Account Summary dialog box. Click Back to edit prior selections. If the account information is correct, click Next.

8. The Completing the Logon Account Wizard dialog box is displayed. Click Finish.

Configuring Devices

Follow these steps to configure devices.

Procedure

1. Create a storage unit on the Data Domain system. See Creating Storage Units on page 52.

2. From the Backup Exec Home page, select Configure Devices from the Tools menu. Select Add OpenStorage from the menu.

3. Configure the Add OpenStorage Device dialog boxs General tab as follows:

l Name: Enter the name of the Data Domain system.

l Server: Enter the Data Domain host name.

l Select the logon account name previously created.

l Select DataDomain as the server type.

l Storage unit: Select storage unit.

l Concurrent Operations: Specify the number of concurrent operations for the device. The total number of concurrent connections (jobs) from a single media server OST plug-in to all associated OpenStorage storage units is 48. The concurrent operations limit for a single device can be determined as follows:

48 >= # OpenStorage storage units + concurrent operations for each storage unit

In the case of a single Data Domain system with a single storage unit, the concurrent operation count can be set as high as 47.

4. Click OK.

5. Configure the Add OpenStorage Device dialog boxs Advanced tab as follows:

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l Accept the default values for Disk Space Management and Direct Access.

l Specify a Data stream chunk size from 64 KB to 256 KB. For best performance, 256 KB is recommended.

6. Click OK.

7. Click the Sharing tab.

A single Data Domain storage unit can be shared by multiple media servers when the shared media servers are associated with a single primary media server.

In the media servers list, select the primary media server, and click OK.

8. You must restart the Backup Exec services when a new Data Domain system is added. In the Restart Services dialog box, click Restart Now.

Results

After the device has been configured, the new storage unit is displayed in the Devices page.

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Figure 10 Backup Exec Devices

Configuring Optimized Duplication The ways to develop duplication jobs in Backup Exec are described in detail in the Symantec Backup Exec 2010 Administrators Guide. You can attach an associated duplicate job to any backup job, or duplicate a previous backup set.

The OST plug-in enables a media server to specify a duplication process and delegate its execution to the Data Domain system. This sharing has the following advantages:

u The backup application system retains control of creating and duplicating backup files and keeps track of all copies in its catalog, which ensures easy and efficient recovery.

u Optimized duplication removes the media server from having to create duplicates of backup files, which reduces the load on the backup application system and frees it for other work.

u The Data Domain system uses Wide Area Network (WAN) efficient replication process for deduplicated data. The process is optimized for WANs, which reduces the overall load on the WAN bandwidth required for creating a duplicate copy.

u Data Domain Replicator software features, such as Low-Bandwidth Optimization Option, can be utilized transparent to the backup application for further reducing the data sent over WAN links that are less than 6 Mb/s.

u Data Domain Replicator software features, such as Encrypted Optimized Duplication, can be used transparent to the backup applications. This feature allows all data sent over the WAN for the purpose of creating duplicate copies to be encrypted, which provides higher security.

Data Domain recommends that you add the destination Data Domain systems IP address to the source Data Domain system using the command:

net hosts add ipaddr {host | "alias host"}

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Note

All media servers, source and destination, must have permission to access both Data Domain systems. It is recommended that you add all of the media servers that need to access a Data Domain system to it using the net hosts add command.

To duplicate an image from one system to another, the following conditions must be met:

u The Data stream chunk size for devices configured on both Data Domain systems between which optimized duplication is to take place must be set to the same value. It is recommended that this value be 256 KB as shown in the OpenStorage Device Properties dialog box.

Figure 11 OpenStorage Device Properties (General Tab)

This value is set during storage unit creation when the media device representing the storage unit on the Data Domain system is added to Backup Exec.

u The Concurrent Operations count of the destination Data Domain system is greater than or equal to that of the source Data Domain system.

Configuration Limitations for Optimized Duplication u Optimized Duplication is supported with Backup Exec 2010 R2 or higher. u Data Domain supports optimized duplication for images that have only one dataset. If

multiple volumes or selections from multiple volumes (C:\Windows, D:, E:, etc.), or agents (SQL Server, SharePoint, etc.), or a combination are being backed up in one job, then the resulting backup image contains datasets for all the drives or the

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applications unless Symantec Backup Exec Hotfix 138226 is applied. This Hotfix can be applied only to Backup Exec 2010 R2. With Hotfix 138226 applied, Backup Exec creates multiple images, one for each dataset in the backup job. In the above example that contains multiple volumes in a job, there would be three images producedone for C:\Windows, one for D: and one for E:. Optimized duplication of select individual images, or all three images, can then be carried out by Backup Exec.

The figure show an example of the type of backup images that can be duplicated using optimized duplication. OST-00000129-446E7A3EBD620BBE can be duplicated using optimized duplication, whereas OST-00000128-446E7A3EBD620BBE cannot be duplicated because it contains data from multiple sources.

Figure 12 New Duplicate Backup Set Job

Add a duplication job to an existing job

These instructions assume that you have developed a backup job that is running (or scheduled to be run) in order to generate a backup set on the source Data Domain system (media device ddr5).

Procedure

1. Open the Job Setup panel.

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2. In the left panel, select Backup Tasks > New job to duplicate backup sets.

3. In the New Job to Duplicate Backup Sets dialog box, select the Duplicate backup sets following a job option, and click OK.

4. In the Source > Job panel, select an available job that is running or scheduled to be run, pf86, as shown below.

5. In the Destination > Device and Media panel, select the remote Data Domain system, in this case a device named ddr8 as shown below. Complete file options as required.

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6. In the Settings > General panel, verify that the source Data Domain system is set properly, in this example a device named ddr5 as shown below.

The Job Monitor panel displays the status of the jobs as they are scheduled and run.

The scheduled backup jog, pf86, and a scheduled duplicate backup job are shown below:

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Each time the backup job runs, the duplicate job is run after it.

The Job History dialog box shown in the next figure contains job statistics and log events for each of the two jobs.

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Figure 13 Job History

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Duplicate a Previous Job

Before you begin

An existing backup job and at least one backup set saved on the source Data Domain system (media device named ddr5 in this example).

Procedure

1. Open the Job Setup panel.

2. Select the New job to duplicate backup tasks in the left hand sub-panel:

3. In the New Job to Duplicate Backup Sets, select the Duplicate existing backup sets option, and click OK.

4. In the Source > Selections panel, select an available media set that has been created on media device ddr5.

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5. In the Destination Device and Media panel, select the remote Data Domain system, in this case a device named ddr8. Complete file options as required.

6. In the Settings > General panel, verify that the source Data Domain system is set properly, in this example a device named ddr5.

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7. You can schedule this duplication for later, or click Run Now to start it.

The Job Monitor panel displays the status of the job as it runs.

Upon completion the job is moved to the Job History list.

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The Job History contains job statistics and log events.

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CHAPTER 5

Administration

Note

Complete descriptions of commands used in this guide are provided in the EMC Data Domain Operating System Command Reference Guide.

This chapter covers the following major topics:

u Data Domain System Administration..................................................................... 84 u NetBackup Administration.................................................................................... 88 u Backup Exec Administration..................................................................................91

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Data Domain System Administration

Optimized Duplication Version Compatibility The Data Domain policy of upgrade compatibility for optimized duplication follows:

u All maintenance and patch versions within a family, are backward compatible. A family is identified by the first two digits of the release number, such as 5.1. For example, 5.1.0.0, 5.1.0.2, 5.1.1.0, and 5.1.2.0 are backward compatible.

u Optimized duplication is backward compatible across two consecutive release families, such as 4.9 and 5.0, although only the current release within each family is tested.

u The destination Data Domain system must be at the highest version. Cases in which the destination node is at a lower revision than the source node or nodes are not supported.

u For bidirectional optimized duplication, both destination and source must run the same release.

u Optimized duplication over WAN should use the Data Domain replication command to adjust for low bandwidth and long latency.

u To configure encrypted optimized duplication, both the source and the destination must run DD OS 5.0 or later.

Modifying an Interface Group

Note

This feature applies to DD Boost-over-IP only.

After the interface group is set up, you can add or delete interfaces from the group. The following example shows how to remove an interface from the configured interface group on the Data Domain system.

Procedure

1. Make sure that no jobs are active from the backup application to the Data Domain system on the interface you are removing from the group. You can do this from the Data Domain system by checking the status of existing connections in the interface group by enter the following command:

# ddboost show connections

Sample output is from a single-node Data Domain system. Refer to documentation about the DD860 Extended Retention system (formerly the DD860 Archiver Administration Guide) for an example of this command on an active tier.

ifgroup Connections Group Name Status Interfaces Bckup Restore Src-repl Dst-repl Synthetic Total ------------------------------------------------------------------- ----------- none 10.6.109.40 0 0 0 0 0 0 none 10.6.109.41 0 0 0 0 0 0 none 10.6.109.244 0 0 0 0 0 0 none 10.6.109.200 0 0 0 0 0 0 none 10.6.109.235 0 0 0

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0 0 0 default enabled 10.6.109.144 0 0 0 0 0 0 default enabled 10.6.109.145 0 0 0 0 0 0 10Glab enabled 10.6.109.230 0 0 0 0 0 0 ------------------------------------------------------------------- ----------- Total Connections: ------------------------------------------------------------------- ----------- 0 0 0 0 0 0

2. Delete an interface or client from group-name or default group on the Data Domain system.

# ddboost ifgroup del default interface 10.6.109.144

After this, the interface is released from the group and would no longer be used by the DD Boost Storage Server for any jobs from the media servers.

Note

Removing the interface registered with the backup application makes the Data Domain system inaccessible to the media servers. The configuration of the ifgroup on the Data Domain system is not deleted.

Results

To make any changes to any interface that is added to the interface group on the Data Domain system at the network layer, remove the interface from the group and add it back.

If you make changes using the net command that modify the interfaces, such as enabling an interface that is configured for ifgroup, execute the ddboost show connections command to update the load balancing view. This updating allows the ifgroup to use the interface.

Removing Advanced Load Balancing and Link Failover Configuration

Note

This feature applies to DD Boost-over-IP only.

The following example illustrates removing a configured interface group on the Data Domain system.

Procedure

1. Make sure that no jobs are active from the backup application to the Data Domain system. Check the status of connections in the interface group by using the following command on a Data Domain system:

# ddboost ifgroup show connections 2. Ensure there are no pending jobs from media servers connected to the Data Domain

system.

3. Disable the group-name or default group on the system:

# ddboost ifgroup disable 4. Reset the interface group:

# ddboost ifgroup reset

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Results

All the interfaces are released from the group. However, media servers can still access the DD Boost storage server on the Data Domain system on the interface registered with the backup application. In the example above, the Data Domain system is still registered with the backup application using 192.168.1.1.

Sizing DD Boost-over FC Device-Set As described in DD Boost Over Fibre Channel Path Management on page 32, the Data Domain system advertises one or more DFC devices of type Processor, which the DD Boost Library uses to communicate with the DD Boost-over-FC service. On the Data Domain system, access to these DFC devices is granted to an initiator, by adding the initiator to a ddboost-type scsitarget access group:

# ddboost fc group add lab_group initiator "initiator-15,initiator-16"

The number of DFC devices advertised to the initiator is controlled by configuring the device-set of the scsitarget access group:

# ddboost fc group modify lab_group device-set count 4

The maximum number of supported DFC devices per Data Domain system is 64.

So, how many DFC devices should be advertised to initiators on a given media server? The answer depends upon several factors:

1. Is the media server queue-depth constrained? As described in DD Boost Over Fibre Channel Path Management on page 32, Windows platforms are considered queue-depth constrained, because the Windows SCSI Pass-Through Interface mechanism will only conduct 1 SCSI request at a time through each of its generic SCSI devices. This impacts the performance of the DD Boost-over FC solution, if multiple connections (e.g. backup jobs) are trying to use the same generic SCSI device. So, for Windows platforms running more than one job, it is useful to advertise multiple DFC devices.

Contrast this with the behavior of the Linux SCSI Generic driver, which imposes no such restriction. Linux is not considered queue-depth constrained, so it is sufficient to simply advertise one DFC device to initiators on Linux systems.

2. Number of physical paths between media server and Data Domain system For each advertised DFC device, the media server operating system will create n generic SCSI devices, one for each physical path through which the media server OS can access the device.

For example, if:

l Media server has 2 initiator HBA ports (A and B)

l Data Domain System has 2 FC target endpoints (C and D)

l Fibre Channel Fabric zoning is configured such that both initiator HBA ports can access both FC target endpoints

then the media server OS will see each device through four physical paths:

A -> C A -> D B -> C B -> D

and will create 4 generic SCSI devices for each advertised DFC device.

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For a Windows media server (with its queue-depth=1 limitation), this allows up to 4 simultaneous SCSI requests to the Data Domain system, even with only one DFC device advertised.

3. Maximum number of simultaneous jobs The NetBackup administrator can control the maximum number of simultaneous backup or restore jobs which will be executed at the same time.

4. Maximum number of connections per job The type of the Data Domain system determines the number of connections needed by the DD Boost Library for each job:

l For DD Extended Retention systems, the DD Boost Library establishes up to 3 connections to the Data Domain system for each job.

l For other types of Data Domain systems, the DD Boost Library establishes a single connection to the Data Domain system for each job.

Sizing Calculation The following calculation may be used to determine the number of DFC devices to advertise on the Data Domain system and to the initiators on a given media server. EMC recommends that the same number of DFC devices be advertised to all initiators on the same media server.

On the Data Domain System The Data Domain system imposes a limit on the number of simultaneous requests to a single DFC SCSI device. Because of this limit, the number of devices advertised needs to be tuned depending on the maximum number of simultaneous jobs to the system at any given time. In general, the larger the number of jobs expected from media servers using DDBoost over FC, the higher the number of devices advertised.

Let J be the maximum number of simultaneous jobs running using DFC, to the Data Domain System at any given time.

Let C be the maximum number of connections per job:

u 3 for Data Domain Extended Retention Systems

u 1 for other types Data Domain systems

Calculate:

u Maximum simultaneous connections to the DD system, using DFC, from ALL media servers: l S = J * C

l DFC Device Count D = maximum(64, 2*(S/128)), round up

l All DFC access groups must be configured with D devices.

Example: Assume:

u 8 media servers, single Data Domain systems, each server running a maximum of 50 jobs at any given time.

u Here, J = 8 * 50 = 400, C = 1 (single Data Domain system), S = J * C = 400, D = 2 * 400 / 128 = 6.25, round up to 7.

u Therefore, all DFC groups on the Data Domain system must be configured with 7 devices.

Assume:

u 8 media servers, DD Extended Retention systems, each server running a maximum of 30 jobs at any given time.

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u Here, J = 8 * 30 = 240, C = 3 (DD Extended Retention system), S = J * C = 720, D = 2 * 720 / 128 = 11.25, round up to 12.

u Therefore, all DFC groups on the DD system must be configured with 12 devices.

Linux Media Servers The number of DFC devices advertised on the Data Domain system using the calculations listed under the On the Data Domain System on page 87 section is sufficient for Linux media servers. No additional configuration is required. Linux media servers are not queue-depth constrained, so many connections can share the same DFC generic SCSI device with no performance impact.

Windows Media Servers The Data Domain server path management logic spreads out connections across available logical paths (Initiator, Target Endpoint, DFC Device). We want to configure enough DFC devices such that each connection uses its own generic SCSI device (logical path) on the media server, with a max DFC device count of 64.

Let X = the number of DFC devices configured on the Data Domain system (from the On the Data Domain System on page 87 section above. Let P = number of physical paths between media server and Data Domain system. Let J = maximum number of simultaneous jobs, and let C = maximum number of connections per job:

3 for DD Extended Retention systems 1 for other types of Data Domain systems

Calculate:

u Maximum simultaneous connections from media server S = J * C, DFC device count D = maximum((S/P), 64, X), round up.

Note that if the value of D is greater than X, then it is sufficient to configure D devices, but only for the access group(s) with Windows clients.

Examples:

Assume:

u 4 physical paths between the media server and Data Domain system, 30 maximum jobs, DD Extended Retention system

u In this case, X = 25, P = 4, J = 30, and C = 3

u Maximum simultaneous connections from media server S = (J * C) = 90

u DFC device count D = (90/4, 25) = 25

So, the Data Domain system should be configured to advertise 25 devices to each initiator on the media server.

Assume:

u 2 physical paths between the media server and Data Domain system, 50 maximum jobs, single Data Domain system

u In this case, X=18, P = 2, J = 40, C = 1

u Maximum simultaneous connections from media server S = (J * C) = 40

u DFC device count D = max(40/2, 18) = 20

So, the Data Domain system should be configured to advertise 20 devices to each initiator on the media server.

Note that since the value of D (20) is greater than the value of X (18), it is sufficient to configure two devices only for the DFC access group with Windows clients.

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Find your OST Plug-in Version Procedure

1. Enter:

# bpstsinfo -pi

Results

The output shows the vendor version, the plug-in version, and the build version.

Find your NetBackup version Procedure

1. Display by entering:

# cat /version

Results

Sample output:

Netbackup-Solaris10 7.5

Network Time-Outs Backup and restore jobs often take a long time to complete. Although the OST plug-in can recover from temporary network interruptions, the operating system on the backup application system might terminate a job prematurely if the backup application time-outs are set too low.

EMC recommends setting time-outs to at least 30 minutes (1800 seconds).

Note

After losing a network connection, administrators should issue the ddboost reset stats command to clear job connections.

Set Backup Application Time-out Using the CLI Procedure

1. Add the following two lines to the /bp.conf file:

CLIENT_CONNECT_TIMEOUT = 1800 CLIENT_READ_TIMEOUT = 1800

Note

The time-out value is expressed in seconds.

Set Backup Application Time-out Using the GUI Procedure

1. Expand the NetBackup Management node.

2. Expand Host Properties.

3. Select Master Servers.

4. In the right pane, double-click the machine name.

Administration

Find your OST Plug-in Version 89

In the property dialog box that is displayed, change the time-out values.

Grouping Storage Units to Provide Failover The administrator can specify a group of storage units to share a workload. The administrator tells the backup application system how to choose among the storage units in the group for the next job by setting one of the following selection criteria:

u Failover (This is the recommended setting) Setting failover as the selection criterion ensures that a backup job does not fail if the storage unit to which it is directed fails. The backup application chooses another storage unit in the same group to finish the job.

u Prioritized

u Round robin

u Load balance

Delete a Data Domain storage server

WARNING

This procedure removes all of the data and resources associated with the storage server. Do not attempt this procedure unless it is necessary.

Procedure

1. Delete all of the files specified by the BACKUP_ID by entering:

# bpexpdate -backupid BACKUP_ID -d 0 2. Delete all of the policies from the GUI.

3. Delete all of the storage units by entering:

# bpstudel -label SU_NAME 4. Delete all the disk pools by entering:

# nbdevconfig -deletedp -stype DataDomain -dp pool-name 5. Delete the storage server by entering:

# nbdevconfig -deletests -storage_server dd22 -stype DataDomain

Note

You can use the GUI to delete the files, lifecycle policies, storage units, and disk pools. For troubleshooting information, see Unable to Delete the Data Domain System on page 94.

6. Remove the credential using the tpconfig command.

# tpconfig -delete -storage_server dd22 -stype DataDomain - sts_user_id username

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90 Data Domain Boost for OpenStorage 2.6 Administration Guide

Backup Exec Administration

Find your OST plug-in version Procedure

1. Go to the Backup Exec install directory and find the file libstspiDataDomain.dll.

2. Right-click the files name and select Properties from the menu.

3. Select the Details tab. The OST plug-in version is displayed as the file version.

Find your Backup Exec version Procedure

1. From the Backup Exec Home page, select About from the Help menu.

Delete Storage Units on Data Domain Systems Procedure

1. There are two options for deleting a storage unit on a Data Domain system:

l You can erase all media within a Backup Exec device (a Data Domain systems storage unit) and then delete the device from Backup Exec.

l You can also delete the device from Backup Exec even if media remains in the device. The storage unit remains on the Data Domain system and some files are left in the storage unit. To recover this space, delete the storage unit on the Data Domain system by entering:

# ddboost storage-unit delete

Recover Backup Files on an OpenStorage Device Procedure

1. From the Backup Exec Home page, select the Devices tab.

2. Select the Data Domain system storage unit on the Devices page.

3. Select a media label.

4. Right-click the media label, and select Restore from the menu.

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92 Data Domain Boost for OpenStorage 2.6 Administration Guide

CHAPTER 6

Basic Troubleshooting

This chapter provides basic troubleshooting tips that might enable customers to resolve issues on their own. For issues that cannot be resolved, customers should contact their contracted support providers.

For more information, see the Data Domain Knowledge Base, which is available at https://my.datadomain.com.

This chapter covers the following topics:

u General Troubleshooting....................................................................................... 94 u Data Domain System Settings for File Replication.................................................. 94 u NetBackup Troubleshooting.................................................................................. 94 u Backup Exec Troubleshooting..............................................................................100

Basic Troubleshooting 93

General Troubleshooting When investigating problems, be aware that the DD Boost software has components on both a Data Domain system and a backup application system. The two environments must be compatible. The following troubleshooting considerations apply to both systems:

u Supported Configurations Ensure that you have a supported configuration as specified in the DD Boost Compatibility List. A supported configuration can become unsupported if any component changes.

This list is available at the Data Domain Support portal (https:// my.datadomain.com). Navigate to the Documentation > Compatibility Matrices page and select Data Domain Boost Compatibility Guide.

u Authorization Failures If you encounter authorization failures, ensure that all of the systems have correct access credentials for the other systems. Configuring a Media Server on page 46 provides instructions on establishing user credentials.

Data Domain System Settings for File Replication For all DD OS versions, the replication throttle command controls replication. Setting the throttle too low can lead to optimized duplications to fail for NetBackup and Backup Exec.

NetBackup Troubleshooting

Unable to Delete the Data Domain System This procedure assumes the following:

u You are unable to delete the Data Domain system.

u You have already run the nbdevconfig command with the deletests option and it has failed, which means that the emm or rmms process might be down.

u All of the files for the specified Data Domain have expired. For instructions on how to expire a file, see your NBU documentation.

If you are still unable to delete the Data Domain system, follow these steps:

Procedure

1. Enter:

# nbdevconfig -deletests -storage_server DDR -stype DataDomain 2. If core files result, contact Data Domain Support. Otherwise, continue to the next step.

3. Follow the instructions below for your operating system.

On a Windows System Procedure

1. Restart the NetBackup services on the media server by running these two executable files:

NBUInstallPath\NetBackup\bin\bpdown.exe NBUInstallPath\NetBackup\bin\bpup.exe

2. Run deletests again. If it fails, enable more detailed NBU logging by opening the NBUInstallPath\NetBackup\nblog.conf file and adding this entry:

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94 Data Domain Boost for OpenStorage 2.6 Administration Guide

NBSTSI=OID=202 3. Enable detailed logging messages on media servers as described in Error Logging on

the Media Servers on page 96.

On a UNIX System Procedure

1. If rmms restarts but emm does not, verify that all of the processes are up, especially emm or rmms.

2. If these processes are not up, enter:

# /bp/bin/goodies/netbackup start 3. Run deletests again. If it still fails, enable more NBU logging by opening the /bp/

nblog.conf file and adding this entry:

NBSTSI=OID=202 4. Enable detailed logging messages as described in Error Logging on the Media

Servers on page 96.

Check the installation 1 Problems with basic operations such as backups may result from improper installation.

Procedure

1. Verify that the files are in the correct location by entering the following, depending on your operating system:

a. On a UNIX system, enter:

# ls /usr/openv/lib/ost-plugins/

The command output should include the names of the shared library files:

libstspiDataDomain.so libstspiDataDomainMT.so

b. On a Windows system, enter:

C:\Program Files\Veritas\bin\ost-plugins

The command output should be the name of the shared library file libstspiDataDomain.dll.

2. Determine the plug-in version by entering:

# bpstsinfo -pi

The vendor version shown in the output is the Data Domain plug-in version, and build version is the version of the DD Boost API.

Note

If the bpstsinfo command fails, check the log files in the /usr/openv/ netbackup/logs/admin directory.

Check Credentials Procedure

1. To display credentials for all Data Domain systems registered as storage servers, enter the following command from the backup application system:

Basic Troubleshooting

Check the installation 1 95

# tpconfig -dsh -all_hosts -stype DataDomain

After you finish

If you receive a message stating that you failed to add credentials for the Data Domain system (OpenStorage server), follow the procedure Adding Credentials on page 48, which describes how to set up credentials and check for errors and inconsistencies.

Resolve License Errors 1 If the Configure Disk Pool wizard reports a license error, do the following:

Procedure

1. Open the file bp.conf.

2. Check if it contains an extra CLIENT_NAME entry.

3. Delete any extra CLIENT_NAME entry.

Error Logging on the Media Servers The error log is the main tool for troubleshooting problems related to NetBackup in an OpenStorage environment.

Procedure

1. Before starting a backup, restore, or optimized duplication operation, enable logging on the NetBackup media server. Follow the instructions for the media servers operating system, or use the NetBackup GUI.

l Enable error logging on a UNIX system

Enter:

# /usr/openv/netbackup/logs/mklogdir l Enable error logging on a Windows system

Enter:

C:\Program Files\Netbackup\logs\mklogdir.bat l Enable logging via the GUI

a. Open the NetBackup Administration Consoles Devices window.

b. In left pane of this window, expand the NetBackup Management node.

c. Expand Host Properties and select Master Servers.

d. In the right pane, double-click the machine name.

e. In the Property directory tree, select Logging.

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96 Data Domain Boost for OpenStorage 2.6 Administration Guide

f. Set the Global Logging level to 4, and click OK.

Results

After you have enabled logging, the OST plug-in prefixes error and informational log messages with the name DataDomain.

Resolving Failed Backups on Media Servers Search for plug-in error messages in the log file as described below for the media servers operating system.

Resolve Failed Backups on a UNIX System Procedure

1. Enter:

# cat /usr/openv/netbackup/logs/bptm/LOGFILE_DATE | grep DataDomain

The command selects lines from the specified log file that contain the word DataDomain. The plug-in uses DataDomain as a prefix for its log messages.

Resolve Failed Backups on a Windows System Procedure

1. Enter:

C:\Program Files\Veritas\logs\bptm\LOGFILE_DATE.log 2. Open the log file and search for the word DataDomain.

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Resolving Failed Backups on Media Servers 97

Resolve Failed File Duplication Procedure

1. Search for plug-in error messages in the media server log files, which are specific to the servers operating system:

l UNIX For read_file:

/usr/openv/netbackup/logs/bpdm For write_file:

/usr/openv/netbackup/logs/bptm For file-replication:

/usr/openv/netbackup/logs/bpdm l Windows

For read_file: C:\Program Files\Veritas\logs\bpdm

For write_file: C:\Program Files\Veritas\logs\bptm

For write_file: C:\Program Files\Veritas\logs\bptm

2. Verify that the replication license is installed by entering:

# license show 3. For further assistance, contact your contracted support provider.

Resolve time-out error Procedure

1. Verify that the client can ping the Data Domain system.

2. Verify that the file system is running on the Data Domain system by entering:

# filesys status 3. Verify that NFS is running on the Data Domain system by entering:

# nfs status

Resolve Plug-In Log Messages When the plug-in encounters an error, it returns an EPLUGIN error code to NetBackup and logs a reason for the error.

Procedure

1. Determine if the reason is one of the following:

l Write Length Exceeds Limit Error The write buffer data size is limited. If you receive an exceeds limit error message, change the buffer size to a value within the specified limit as described in Configuring Buffers on page 54.

l Program Not Registered The following output indicates that the program is not registered:

(: RPC: Program not registered) 2. Enable DD Boost by installing a valid license:

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98 Data Domain Boost for OpenStorage 2.6 Administration Guide

# license add ddboost-license-code 3. Verify that the file system is running on the Data Domain system by entering:

# filesys status

Resolve Cannot connect on socket Error This error results when the command nbdevconfig -creatests has been run, but the storage server is not created because of a socket connection error.

Follow these steps:

Procedure

1. Check to make sure the nbemm process is running. If it keeps failing upon startup, usually there is an issue with the NBU database.

2. Use the vxlogview utility to check the logs located in /usr/openv/logs/51216- *.log for errors.

3. Recreate the Database. Enter:

# /usr/openv/db/bin/create_nbdb -drop

NetBackup Backup Jobs Fail on Solaris Media Servers If a file backup job fails with a media write error (84) at the start of the job, a typical activity monitor job detail might contain the following:

2/28/2009 3:36:22 AM - Critical bptm(pid=1750) failure to open sts for storage server apoddrrp01: plug-in reports error 2060046 plugin error2/28/2009 3:36:23 AM - end writing media open error(83)

The bptm log may contain information similar to the following:

01:33:02.585 [28874] <16> apoddrrp01: /usr/openv/lib/ost-plugins/ libstspiDataDomain.so:stspi_open_server STS_EPLUGIN Can't connect to mountd on apoddrrp01 (: RPC: Miscellaneous tli error - An event requires attentionError 0)

In the above example, an entry in /etc/inet/ipsecinit.conf has enforced encryption on traffic from port 665 (sun-dr). However, the Solaris operating system had Sun Dynamic reconfiguration disabled. As a result, although the media server used port 665 to connect via NFS to the Data Domain system, the packet did not leave the media server because it was not encrypted.

To fix this problem, you need to disable dynamic reconfiguration.

Disable dynamic reconfiguration Procedure

1. Uncomment or remove sun-dr entries in /etc/inet/inetd.conf:

sun-dr stream tcp wait root /usr/lib/dcs dcssun-dr stream tcp6 wait root /usr/lib/dcs dcs

2. Have inetd reread the configuration file, by entering:

kill -HUP pid-inetd 3. Uncomment or remove the sun-dr entries in /etc/inet/ipsecinit.conf:

{dport sun-dr ulp tcp} permit {auth_algs md5}{sport sun-dr ulp tcp} apply {auth_algs md5 sa unique}

4. Remove the active IPsec configuration from the running system.

Basic Troubleshooting

Resolve Cannot connect on socket Error 99

a. Obtain the index numbers by entering:

ipsecconf | grep sun-dr b. Delete the policy for sun-dr by entering:

ipsecconf -d index

Optimized Duplication Job Fails The replicator software license for optimized duplication is required on both the source and destination Data Domain systems that run DD OS 4.7 or later.

If this license is not installed, an optimized duplication job fails. A typical activity monitor job detail indicates a media write error (84) occurred. The NetBackup bpdm log states that the NFS operation is not supported.

Add license for Replicator Procedure

1. Obtain a replicator license code from Data Domain.

2. From the command-line interface on each Data Domain system, add the license code:

# license add license code

Virtual Synthetic Backup u Verify that normal backups are OK.

u Verify that the Storage Lifecycle Policy attributes are set properly.

u Verify that TIR files are being generated in the storage unit. # ddboost storage-unit show [compression] [storage-unit-name]

u Verify that DDP_SynWR RPCs are being sent. # ddboost show stats

u Verify that OptimizedImage flag is set. # nbdevquery -liststs

u Verify virtual-synthetics is enabled on the Data Domain system. # ddboost option show

Backup Exec Troubleshooting

Basic Troubleshooting u Verify that the concurrent connections (jobs) count is set properly for all storage

units. l Backup Exec: The total number of concurrent connections from a single media

server plug-in to all associated OpenStorage storage units is 48. This number was specified when you configured the device. See Configuring Devices on page 70.

u When encountering a problem, try to stop Backup Exec services and restart them. If this does not work: l Reboot the server.

l Start the debugger and try to recreate the problem.

Check the installation Problems with basic operations such as backups may result from improper installation.

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100 Data Domain Boost for OpenStorage 2.6 Administration Guide

Procedure

1. Verify that libstspiDataDomain.dll is in C:\Program Files\Symantec \Backup Exec\.

2. Determine the plug-in version by right-clicking on the DLL and opening its Properties >

Details.

Check Credentials for a Data Domain System Procedure

1. From the Backup Exec Home page, go to the Devices page.

2. Right-click the OpenStorage device and display its Properties. Note the logon account.

3. From the system menu go to Network > Logon Account Management.

4. Select the logon account and verify its user name. Try to edit the account to verify the password. This user name and password should match the user name set for DD Boost and password on the Data Domain system.

Resolve License Errors Procedure

1. If the OpenStorage option is not enabled, from the Backup Exec Tools menu select Install Options and License Keys on this Media server.

2. Click Next to go to Configure Options.

3. Open the Backup Exec Options and verify that the Deduplication Option is selected.

4. Click Cancel to avoid making unintended changes.

Figure 14 Backup Exec Review Features for Installation Page

Basic Troubleshooting

Check Credentials for a Data Domain System 101

Set Up Active Debugging Use the Backup Exec debugging utility to troubleshoot Backup Exec issues.

Procedure

1. From the Backup Exec Home page, from the Tools menu select Support Utilities > Run the Debug Monitor for Active Debugging.

The Backup Exec Debug Monitor is displayed.

Figure 15 Backup Exec Debug Monitor

2. The following Capture options must be selected (enabled): Job Engine, Backup Exec Server, and Device and Media.

3. Capture to file must be enabled.

4. From the Tools > Settings menu, select the Device and Media Debug setting. Select Enable verbose logging if it is not enabled.

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102 Data Domain Boost for OpenStorage 2.6 Administration Guide

Figure 16 Settings Menu

The log file that is captured is named media server-SGMon.txt. It is located in the logs directory.

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Set Up Active Debugging 103

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104 Data Domain Boost for OpenStorage 2.6 Administrati

Manualsnet FAQs

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