Dell PowerMaxOS 10 V10.0.0 Storage Replication Guide PDF
Summary of Content for Dell PowerMaxOS 10 V10.0.0 Storage Replication Guide PDF
Dell PowerMax File Replication Guide
10.0.0.0
July 2022 Rev. 01
Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid
the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
2022 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.
PREFACE As part of an effort to improve its product lines, revisions of the software and hardware are periodically released. 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 Dell 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 Dell EMC Online Support (https://support.emc.com) to
ensure that you are using the latest version of this document.
Where to get help Dell support, product, and licensing information can be obtained as follows:
Product information
For product and feature documentation or release notes, go to the PowerMax Documentation page at : https://www.dell.com/support/kbdoc/en-us/000189115/powermax-info-hub- product-documentation-videos?lang=en.
Troubleshooting For information about products, software updates, licensing, and service, go tohttps://www.dell.com/ supportand locate the appropriate product support page.
Technical support
For technical support and service requests, go to https://www.dell.com/support and locate the Service Requests page. To open a service request, you must have a valid support agreement. Contact your Sales Representative for details about obtaining a valid support agreement or to answer any questions about your account.
Revision history
Document revision Date Description
01 July 2022 Initial release.
PREFACE 3
PREFACE.....................................................................................................................................................................................3
Chapter 1: Introduction................................................................................................................. 5 File Replication via SRDF/S and SRDF/A..................................................................................................................... 5 Restrictions and Limitations ............................................................................................................................................ 5
Chapter 2: Concepts and Terminologies........................................................................................ 7 Terminologies........................................................................................................................................................................7 Prerequisite for File replication........................................................................................................................................ 8 Initial Configuration Wizard and Filesystem protection .............................................................................................8 Configure Overlapping Subnets....................................................................................................................................... 8 File Control Network ......................................................................................................................................................... 8 Remote Connections ......................................................................................................................................................... 8 Replication Sessions .......................................................................................................................................................... 8 Events and Alerts ............................................................................................................................................................... 9
Accessing the Replication Session Alerts................................................................................................................ 9
Chapter 3: Managing Replication Session.................................................................................... 10 File Control Network Setup.............................................................................................................................................10
Create File Control Network..................................................................................................................................... 10 View File Control Network......................................................................................................................................... 12 Modify File Control Network..................................................................................................................................... 12 Delete File Control Network...................................................................................................................................... 14
Remote connection setup................................................................................................................................................15 Create Remote connection .......................................................................................................................................15 View Remote Connection...........................................................................................................................................16 Modify Remote Connection....................................................................................................................................... 17 Delete Remote Connection........................................................................................................................................18
Create Replication Session (Sync and Async)............................................................................................................19 Update Replication Session............................................................................................................................................ 23 View Replication Session.................................................................................................................................................24 Stop Replication Session................................................................................................................................................. 25 Start Replication Session................................................................................................................................................ 26 Planned Failover without Auto Start............................................................................................................................ 27 Planned Failover with Auto Start.................................................................................................................................. 30 Unplanned Failover............................................................................................................................................................32 Delete Replication Session.............................................................................................................................................. 34
Chapter 4: Recommendation and Best Practices......................................................................... 36
Index........................................................................................................................................... 37
Contents
4 Contents
Introduction File management and orchestrations are handled by Unisphere for PowerMax. All File features are managed via both UI and REST API. The File alerts and performance data can be accessed from the common Alerts and Performance sections of Unisphere PowerMax.
File is a highly available platform. For each File node, there exists a backup node and also supports heterogeneous networking. File nodes need not have same SLIC type or number of SLICs and each node can have different subnets. However, the node denoted as Backup Node for a NAS Server is expected to have the same subnets as its primary.
File fully automates storage provisioning. For the given Filesystem and its size, the File platform automates the provisioning and masking of PowerMax volumes. File uses SnapVX for snapshots and SRDF/S or SRDF/A for synchronous or asynchronous replication support.
This guide focuses on PowerMax File Replication features.
PowerMax File leverages SRDF and enables both synchronous and asynchronous replication modes at nas server level. It has a fully automated storage provisioning on the destination and allows replicating snapshot policies.
Whats new? File replication features exposed via UI and REST.
Create, start, stop, planned failover, unplanned failover, update, delete. Integrated Alerts, Performance, Jobs and Security. Automated File replication session management through UI. New Initial Configuration Wizard.
Topics:
File Replication via SRDF/S and SRDF/A Restrictions and Limitations
File Replication via SRDF/S and SRDF/A The replication methods available for File Systems are:
Asynchronous replication with SRDF/A. Synchronous replication with SRDF/S.
SRDF synchronous (SRDF/S) - SRDF/S replication maintains a real-time copy at arrays that are located within 200 kilometers. The local array acknowledges writes from the production host when they are written to cache at the remote array.
SRDF asynchronous (SRDF/A) - SRDF/A replication maintains a dependent write-consistent copy at arrays at unlimited distances. The local array immediately acknowledges writes from the production host, and, therefore, replication has no impact on host performance. Data at the remote array is typically only seconds behind the primary site.
Restrictions and Limitations 1. Snapshots are not replicated on the destination. Only the snap schedules are replicated. However, user can take a snapshot
or attach snap schedule on the destination. 2. When the snap schedule is replicated and there is a failure on the source side, the alerts on the source side appear on the
destination side as well. Once the alerts on the source are removed, the alerts on the destination will be auto corrected. 3. If system Write pending WP% is above 50%, system will give priority to the IOs. Once WP% ratio comes down to below
50%, SRDF sync will resume. 4. When there are large number of invalid tracks that need to be synchronized between the source and destination, the
start operation might report a failure to the UI (Unisphere for PowerMax) but it completes in the background. Once the SRDF state moves into synchronized or consistent state which is reported in the replication session page, re-run the start operation from the UI.
1
Introduction 5
5. Extend FS post failover when the other site is not available is not supported. 6. Auto failover in case of disaster is not supported. One will have to perform failover of the replication sessions manually.
6 Introduction
Concepts and Terminologies
Topics:
Terminologies Prerequisite for File replication Initial Configuration Wizard and Filesystem protection Configure Overlapping Subnets File Control Network Remote Connections Replication Sessions Events and Alerts
Terminologies Terms used in this document:
Term Definition
File cluster A set of File nodes that operate together. A File cluster can support a maximum of 8 nodes. The first node by default operates as the Cluster controller and any node can take over Cluster controller activities in the event of first node failure.
NAS server A virtual container that hosts one or more Filesystems. The NAS Server has a unique name, one or more IP addresses, exposes NAS protocols such as NFS, SMB, FTP and SFTP. Naming services like DNS, LDAP, NIS are configured on a NAS Server. Users and groups may be defined locally with local files. NAS Server facilitates protection by remote NDMP software. PowerMax File supports 3-way NDMP. NAS Server also allows configuration for virus checker. A NAS Server runs by default on the primary node. In case of a node failure, the NAS Server is moved automatically to its backup node.
Node Node is the hosting platform for running PowerMax File Replication in a dockerized container. Each node hosts Base Linux OS, Docker services, and other necessary software to connect each PowerMax File Replication container to platform. There is 1 node running per Front end director .
Primary Node One of the File cluster nodes on which the NAS Server currently runs.
Backup Node One of the PowerMax File cluster nodes, on which the NAS server is backed up for fault tolerance purposes. This means that the NAS server will be moved to this node during any failover event.
SRDF Symmetrix Remote Data Facility. A PowerMax provided Remote Replication feature.
2
Concepts and Terminologies 7
Prerequisite for File replication 1. To create the initial RDF group, use the symrdf addgrp command. The CLI command is documented in the Dell EMC
Solutions Enabler SRDF Family CLI User Guide. 2. To update the Remote Machine Table for Gige use the symcfg -rmt create command. This is documented in the Dell EMC
Solutions Enabler Array Controls and Management CLI User Guide.
Initial Configuration Wizard and Filesystem protection
File replication uses SRDF to facilitate remote replication in Synchronous and Asynchronous modes at NAS server level. Below items talk about the Initial Configuration Wizard for File Protection.
Figure 1. Initial Configuration Wizard
Configure Overlapping Subnets
Subnet which exists on all Nodes is required to create File Control Network. For more details on subnet refer to the Dell PowerMax File Quick Start Guide, section - ICW Workflow Configure Subnets.
File Control Network NAS replication setup needs mesh connectivity between NAS entities participating in the replication which are configured as part of File control network.
Networking Requirements:
Replication needs to provision N + 1 interface with one IP address each (where N represents number of nodes in the File cluster) and one interface for the File cluster.
NOTE: File control network needs to be created both on the source and destination.
Remote Connections Remote Connection object is required to establish a connection to a remote array. It contains mainly the IP of the cluster of the remote array along with the local sites File control network details. The remote connection must be created on both the File clusters prior to create any replication session.
Replication Sessions FILE replication allows the nasServer and the underlying filesystems to be replicated with the same configuration as the source on the destination. Mimicking the configuration is done automatically as a part of destination auto-provisioning and the replication mode can be either synchronous or asynchronous.
NOTE: When closed the ICW can be reopened by clicking the information icon on the right-hand side of any of the File
pages Titles.
8 Concepts and Terminologies
Figure 2. Information Icon
NOTE: The File Protection guided tour behaves in a similar fashion to the ICW with only the inclusion of a back button to
return to the ICW.
NOTE: All operations are supported using FILE UI and REST API
Events and Alerts File Alerts related to the Replication Session are integrated to UI . These alerts will be visible on the alerts list view and the alerts count is displayed on the details view of the replication session. The alert policies for replication session are enabled by default.
Accessing the Replication Session Alerts
About this task
Once the local PowerMax array is selected, follow the below steps:
Steps
1. Select Data Protection > File Protection.
2. Click on REPLICATION tab > REPLICATION SESSION tab.
3. Select the replication session and click on the information icon to view its details on the right pane of the screen.
4. The Alerts Count for the Replication Session is displayed.
5. Click on the Alerts Count hyperlink to view the corresponding alerts in the Alerts List View.
Results
The list of alerts can now be viewed.
For more details on alerts, refer to the Dell PowerMax File Quick Start Guide.
Concepts and Terminologies 9
Managing Replication Session
Topics:
File Control Network Setup Remote connection setup Create Replication Session (Sync and Async) Update Replication Session View Replication Session Stop Replication Session Start Replication Session Planned Failover without Auto Start Planned Failover with Auto Start Unplanned Failover Delete Replication Session
File Control Network Setup
File control network is a separate network for replication control communication. This network facilitates dedicated communication between source and destination for replication workflows. Below administrative operations are allowed on File control network: 1. Create File Control Network 2. List File Control Network 3. Modify File Control Network 4. Delete File Control Network
The document further outlines how each of these workflows are executed from the UI.
Create File Control Network
1. Select Data Protection. 2. Select File Protection. 3. Click REPLICATION tab. 4. Click Create. 5. Continue to work through the Create File Control Network wizard.
Option Description
Subnet Configuration
Enter a name for the File control network.
Select the subnet.
Select the network device on each of the File nodes.
General Configuration
Enter the Local Cluster IP Address, Prefix Length, Gateway and Node address of all the nodes in the File cluster.
Summary Review the content and click Back to go back and make any corrections.
6. Click Run Now to create the File Control Network.
A File Control Network is now created.
Below are the UI screen shots for each of the steps described in the above table:
3
10 Managing Replication Session
Figure 3. Subnet configuration
Figure 4. General configuration
Figure 5. Summary
Managing Replication Session 11
View File Control Network
The list view of the File control network provides details about the local cluster IP address, prefix length, gateway, physical devices on all the nodes along with the IP address.
About this task
Once the local PowerMax array is selected, follow the below steps to view the File control network:
Steps
1. SelectData Protection.
2. SelectFile Protection.
3. Click on REPLICATION tab.
4. Under FILE CONTROL NETWORK tab, select the File control network which is created and the press the information button . The details appear on the right-hand side of the screen.
Results
The List of File Control Network can now be viewed.
Figure 6. File Control Network List
Modify File Control Network
To account for the use cases when user needs to change the IP address because a wrong IP address was assigned or use a different IP, the modify support is provided.
About this task
Once the local PowerMax array is selected, follow the below steps to modify the File control network:
Steps
1. SelectData Protection.
2. SelectFile Protection.
3. Click on REPLICATION tab.
4. Under FILE CONTROL NETWORK tab, select the check box against File Control Network you want to modify.
5. Click the Modify icon. The Modify File Control Network wizard opens.
6. Change the required parameters.
7. Click Run Now to modify the File Control Network.
12 Managing Replication Session
Results
This operation now modifies the File Control Network.
Below are the UI screen shots for each of the steps described in the above table:
Figure 7. Subnet configuration
Figure 8. General configuration
Figure 9. Summary
Managing Replication Session 13
Delete File Control Network
The File control network which is no longer used for any replication workflows can be deleted. Prior to deleting the file control network, the replication sessions and remote connections need to be deleted.
About this task
Once the local PowerMax array is selected, follow the below steps to delete File control network:
Steps
1. SelectData Protection.
2. SelectFile Protection.
3. Click on REPLICATION tab.
4. Under FILE CONTROL NETWORK tab, select the check box against File Control Network you want to delete.
5. Click the Delete icon. The Delete File Control Network wizard opens.
6. Click OK to delete the File Control Network.
Results
This operation now deletes the File Control Network.
NOTE: Before deleting File Control Network, Remote Connection must be deleted.
Figure 10. Select checkbox against the file control network to be deleted
Figure 11. Delete File Control Network
14 Managing Replication Session
Remote connection setup
Remote connection is required to establish a connection between the source and destination File clusters. It contains mainly the cluster IP of the remote array along with the File control Network of the current site. Creating a remote connection is a pre-requisite for replication session creation.
Create Remote connection
Remote connection is used to corelate the cluster address of the remote array along with the File control network of the current array. Once remote connection is established between both the arrays, the connection status shows as UP which means the replication sessions can be created further.
Once the File Control Network is established on both the sites follow the below steps to establish Remote Connection:
1. Select Data Protection. 2. Select File Protection . 3. Click REPLICATION tab. 4. Click REMOTE CONNECTION tab. 5. Click Create. 6. Continue to work through the Create Remote Connection wizard
Option Description
Create Remote Connection Wizard a. Enter a Name b. Enter the Remote Cluster IP Address c. Select a File Control Network
7. Click on Run Now.
A Remote Connection is now Established.
Figure 12. Remote Connection Tab
Managing Replication Session 15
Figure 13. Create Remote Connection
View Remote Connection
The list view of the remote connection provides the details about the local and remote cluster address, file control network along with the connection status.
About this task
Once the local PowerMax array is selected, follow the below steps to view the remote connection:
Steps
1. SelectData Protection.
2. SelectFile Protection.
3. Click on REMOTE CONNECTION tab.
4. Under REMOTE CONNECTION tab, select the remote connection which is created and the click the information icon . The details appear on the right-hand side of the screen.
Results
The List of Remote Connection can now be viewed.
Figure 14. View List of Remote Connection
16 Managing Replication Session
Modify Remote Connection
Modify remote connection capability is provided to accommodate the change in local cluster IP address used by an existing remote system to communicate with remote cluster.
About this task
Once the local PowerMax array is selected, follow the below steps to modify remote connection:
Steps
1. SelectData Protection.
2. SelectFile Protection.
3. Click on REMOTE CONNECTION tab.
4. Select the Remote Connection and click Modify. Modify Remote Connection dialogue box opens.
5. Modify the Name, Remote Cluster IP, and File Control Network
6. Click Run Now.
Results
This operation now modifies a Remote Connection.
Figure 15. Select Remote Connection
Managing Replication Session 17
Figure 16. Modify Remote Connection
Delete Remote Connection
The remote connection which is no longer used for any replication workflows can be deleted. Prior to deleting the remote connection, the replication sessions need to be deleted.
About this task
Once the local PowerMax array is selected, follow the below steps:
Steps
1. SelectData Protection.
2. SelectFile Protection.
3. Click on REMOTE CONNECTION tab.
4. Under REMOTE CONNECTION tab, select the check box against The Remote Connection you want to delete.
5. Click the Delete icon. The Delete Remote Connection wizard opens.
6. Click OK.
Results
This operation now deletes a Remote Connection.
18 Managing Replication Session
Figure 17. Select Remote Connection
Figure 18. Delete Remote Connection
Create Replication Session (Sync and Async) The replication create operation sets up replication of all the user file systems of a NAS server in one cluster (the "source") to a NAS server and corresponding file systems in another cluster (the "destination"). File replication uses SRDF to enable both synchronous and asynchronous type of replication. Since the replication is at the Nas server level, user will have to provide a name of the Nas server to be created on the destination side and the replication creation will take care of creating all the user file system with the same properties as the source side. User will have to provide the remote storage resource pool and the local and remote RDF Dir:Port details as an input to create the replication session.
Once the Remote Connection is established on both the sites follow the below steps to create a replication session:
1. Select Data Protection. 2. Select File Protection. 3. Click REPLICATION tab. 4. Click REPLICATION SESSION tab. 5. Click Create. 6. Continue to work through the Create Replication Session wizard.
Option Description
General Configuration a. Enter a name for the replication session. b. Select the Nas server on the source to be replicated. c. Enter the destination nas Server name. d. Select Destination Primary Node and Backup Node, Remote Connection, Destination Storage
Resource Pool, Mode (Synchronous or Asynchronous) and RPO (only for Asynchronous).
NOTE: You can test the Remote Connection using the 'Test' button (optional).
Managing Replication Session 19
NOTE: If the destination array is not visible, then scan the remote PowerMax array using the scan button.
e. Click Next.
SRDF Configuration Provide the SRDF details:
a. Select Communication Protocol (FC/GigE). b. Select Local Configuration Primary Director Port and Backup Director Port. c. Select Remote Configuration Primary Director Port and Backup Director Port.
Summary Review the content and click Back to go back and make any corrections.
7. Click on Run In the Background. 8. Go to the job list in the UI and click on view all jobs. 9. Click on the hyperlink beside the create replication job to track the status. 10. On the destination side, only the IP address of the nas server will be replicated, but the corresponding network device needs
to be attached. Once the replication session is created, login to the UI of the destination site and wait for the IP address to appear on the destination Nas server (go to all details page of the Nas server by clicking the hyperlink). It may take about 15 minutes for the IP address to appear on the destination nas server.
11. Go to the NETWORK tab 12. Select the FILE INTERFACE tab 13. Select the interface and click on the MODIFY option. 14. Select the required subnet, the physical device and click on OK.
NOTE: If the network device is not attached on the destination side, then the following will be expected:
Replication session will be in OK_BUT state.
There will be an alert PEER_VDM_INTFDEVICE_NOT_MATCH indicating a mismatch in the network configuration.
Example: Peer nas server network configuration is different with local side 'REP12' (62419eca-641a-
fade-64da-026048200205) (x06t1m2I73)
UI screenshots for each of the steps described in the above table.
Figure 19. General Configuration
20 Managing Replication Session
Figure 20. SRDF Configuration
Figure 21. Summary
Managing Replication Session 21
Figure 22. Job Details of the Replication Session Creation
Figure 23. Tasks
Figure 24. All Details View of the Nas server on Destination
22 Managing Replication Session
Figure 25. Modify File Interface
Update Replication Session During the lifetime of a replication session, it is possible that file systems and clone may be added to the source NAS server. When this happens the replication session is supposed to automatically add file systems and clone to the destination NAS server. It is possible, for some unspecified reason, that this may not happen. In this case the replication session is considered inconsistent. The NAS server replication update action is designed to rectify this inconsistency. When the replication session update action is issued the file systems associated with the source NAS server are enumerated. If there is no file system with the same name on the destination NAS server then it will be created, and replication will be established between them. Similarly, if there is a file system with the same name on both NAS servers but there is no replication established, then it will be created. When there are missing file systems or the file systems are not replicated, there will be an alert displayed in the UI SOME_FS_REP_SESSIONS_NOT_CREATED
Example: Some FS replication sessions not created for NAS server replication session 'nas14Async'.
Follow the below steps to update the replication session:
1. Select Data Protection. 2. Select File Protection. 3. Click REPLICATION tab. 4. Click REPLICATION SESSION tab. 5. Select the required NasServer Session from the list view. if update can be performed, the option is enabled. 6. Click Update. The Update Replication Session dialogue box opens. 7. Click Run Now.
UI screenshot
Figure 26. Select Replication Session
Managing Replication Session 23
Figure 27. Update Replication Session
NOTE:
1. Adding a filesystem to a nas server under replication would create the corresponding filesystem on the destination.
2. Cloning a replicated filesystem would follow the same workflow as the above point. Completing the baseline copy would
take some time depending on the data on the source side and the session status will be SyncInProg but eventually move
to synchronized (synchronous replication) or consistent state (asynchronous replication).
3. Deleting a filesystem under replication from the source will not delete the corresponding filesystem on the destination.
View Replication Session The list view of the replication session talks about the source and destination Nas servers, local and remote system ID, mode of the replication session, SRDF state, health of the session and the role of the current system (production mode or destination mode). The corresponding alerts (if any) on the session will be displayed in the detail panel on the right-hand side.
To view a Replication session, follow the below steps:
1. Select Data Protection. 2. Select File Protection. 3. Click REPLICATION tab. 4. Click REPLICATION SESSION tab. 5. Select the checkbox against the name of the replication session to view its details on the right pane of the screen.
You can now view all the Replication Sessions.
NOTE: Click on the information icon for detailed view of all the replication sessions.
24 Managing Replication Session
Figure 28. View Replication Sessions
Stop Replication Session When there are multiple replication sessions, the user might want to stop the data synchronization for few of the low priority replication sessions to give priority to other replication sessions. Stop replication helps in achieving this. Stop replication would render the session in suspended state.
Follow the below steps to stop a replication session:
1. Select Data Protection. 2. Select File Protection. 3. Click REPLICATION tab. 4. Click REPLICATION SESSION tab. 5. Select the checkbox against the name of the replication session you want to stop. 6. Click Stop. The Stop Replication Session dialogue box opens. 7. Click OK to stop the selected replication session.
This operation now stops the NAS Server Replication Session.
UI screenshot
Managing Replication Session 25
Figure 29. Select Replication Session
Figure 30. Stop Replication Session
Start Replication Session To give priority to few of the replication sessions, the user might have stopped the data transfer between the source and destination using the stop replication workflow. This would result in accumulating the data on the source side. The user can use the start replication workflow to restart the data synchronization from the previous replicated point. Start workflow comes into picture to restart the data synchronization from the production site to the non-production site which can happen when the direction of replication is changed. Depending on the amount of data to be synchronized, the session will initially be in SyncInProg state but eventually move to synchronized (synchronous replication) or consistent state (asynchronous replication).
NOTE: NAS Server inconsistency is possible. Before starting the replication session, ensure backup of remote NAS Server
is taken. For detailed steps to take the backup of the remote nas server, refer to the Dell PowerMax Quick Start Guide for
File.
1. Select Data Protection. 2. Select File Protection. 3. Click REPLICATION tab. 4. Click REPLICATION SESSION tab. 5. Select the checkbox against the name of the replication session you want to start.
26 Managing Replication Session
6. Click Start. The Start Replication Session dialogue box opens. 7. Click OK to stop the selected replication session.
This operation now starts the NAS Server Replication Session.
Figure 31. Select Replication Session
Figure 32. Start Replication Session
Planned Failover without Auto Start UI
While managing multiple replication sessions, to achieve load balancing, the user might want to reverse the direction of replication. Planned failover of a replication session will help one achieve this by reversing the direction of replication on the source and the destination NAS server. The original source NAS server will be changed to destination mode and the original destination NAS server will be changed to production mode. The session will be in split state after planned failover without auto-start.
NOTE:
This operation needs to be performed on the source side.
Managing Replication Session 27
After planned failover is completed, the File replication session is in switchedover state and start replication needs to be
performed from the original destination to the original source.
1. Select Data Protection. 2. Select File Protection. 3. Click REPLICATION tab. 4. Click REPLICATION SESSION tab. 5. Select the checkbox against the name of the replication session you want to perform a planned failover. 6. Click Planned Failover. The Planned Failover Replication Session dialogue box opens. 7. Click Run In The Background to proceed with the Planned Failover. 8. Go to the job list in the UI and click on view all jobs. 9. Click on the hyperlink beside the planned failover without auto-start job to track the status.
This operation now performs a Planned Failover.
Figure 33. Select Replication Session
28 Managing Replication Session
Figure 34. Planned Failover Replication Session dialogue box
Figure 35. Job List
Managing Replication Session 29
Figure 36. Planned Failover Tasks
Planned Failover with Auto Start While managing multiple replication sessions, to achieve load balancing, the user might want to reverse the direction of replication. Planned failover of a replication session will help one achieve this by reversing the direction of replication on the source and the destination NAS server. The original source NAS server will be changed to destination mode and the original destination NAS server will be changed to production mode. Planned failover with auto-start will switch the source and destination of the replication session and start the replication in reverse mode. As start replication is also invoked, the session will initially be in SyncInProg state but eventually move to synchronized (synchronous replication) or consistent state (asynchronous replication).
NOTE: This operation needs to be performed on the source side.
Follow the below steps to reverse the direction of the Replication Session:
1. Select Data Protection. 2. Select File Protection. 3. Click REPLICATION tab. 4. Click REPLICATION SESSION tab. 5. Select the checkbox against the name of the replication session you want to perform a planned failover with Auto Start. 6. Click Planned Failover. The Planned Failover Replication Session dialogue box opens. 7. Select the checkbox 'Automatically start the NAS Server Replication on the destination system'. 8. Click Run In The Background to proceed with the Planned Failover. 9. Go to the job list in the UI and click on view all jobs. 10. Click on the hyperlink beside the planned failover without auto-start job to track the status.
This operation now performs a Planned Failover with Auto Start.
30 Managing Replication Session
Figure 37. Select Replication Session
Figure 38. Planned Failover Replication Session dialogue box
Managing Replication Session 31
Figure 39. Job Details
Figure 40. Tasks
Unplanned Failover In the event of a primary site failure due to unplanned environmental catastrophes or any system failures, the external NFS/CIFS clients that are using the file system(s) served by the NAS-server active on the primary site experience a Data Unavailability (DU) situation. In such scenarios, the Administrator can run the replication failover option to quickly mitigate the DU scenario.
NOTE: This operation is performed on the destination site in case of a disaster (source site unavailable). Start needs to be
performed after the original source is brought up.
This operation will reverse the direction of the replication session and makes the nas server in production mode on the original destination.
Follow the below steps to perform unplanned failover of the replication session:
1. Select Data Protection. 2. Select File Protection. 3. Click REPLICATION tab. 4. Click REPLICATION SESSION tab. 5. Select the checkbox against the name of the replication session you want to perform an unplanned failover. 6. Click More Actions. 7. Click Unplanned Failover. The Unplanned Failover Replication Session wizard opens. 8. Click Run In The Background to proceed with the Unplanned Failover. 9. Go to the job list in the UI and click on view all jobs. 10. Click on the hyperlink beside the planned failover without auto-start job to track the status.
This operation now performs an Unplanned Failover.
NOTE: User can select a maximum of 5 replication sessions at once to perform unplanned failover.
32 Managing Replication Session
Figure 41. Select Replication Session
Figure 42. Unplanned Failover Replication Session dialogue box
Figure 43. Job List
Managing Replication Session 33
Figure 44. Tasks
Delete Replication Session Delete replication operation deletes the replication for all the user filesystem of a Nas server on both the systems and the current system. The NAS Server and its filesystems data will not be removed. Depending on the SRDF state, UI will automatically select the type of delete replication (delete replication from both sides or delete replication from current side). Delete replication from both source and destination requires both the sites to be up and delete replication from the current (or local) side is applicable when we dont have access to the peer side.
Follow the below steps to delete a replication session:
1. Select Data Protection. 2. Select File Protection. 3. Click REPLICATION tab. 4. Click REPLICATION SESSION tab. 5. Select the checkbox against the name of the replication session you want to delete. 6. Click More Actions. 7. Click Delete. The Delete Replication Session dialogue box opens with a default option to delete the session from both source
and destination. 8. Click OK to delete the replication session.
This operation now deletes a replication session.
34 Managing Replication Session
Figure 45. Delete Replication Session
Figure 46. Delete Replication Session Dialogue Box
Managing Replication Session 35
Recommendation and Best Practices 1. At least 2 RDF ports need to be used for better performance. 2. To successfully failover the replication sessions to the destination when the source is unavailable, select five replication
sessions at once.
4
36 Recommendation and Best Practices
Index
A
audience 3
C
comments 3 conventions for publication 3
P
preface 3
R
related documentati
Manualsnet FAQs
If you want to find out how the 10 Dell works, you can view and download the Dell PowerMaxOS 10 V10.0.0 Storage Replication Guide on the Manualsnet website.
Yes, we have the Replication Guide for Dell 10 as well as other Dell manuals. All you need to do is to use our search bar and find the user manual that you are looking for.
The Replication Guide should include all the details that are needed to use a Dell 10. Full manuals and user guide PDFs can be downloaded from Manualsnet.com.
The best way to navigate the Dell PowerMaxOS 10 V10.0.0 Storage Replication Guide is by checking the Table of Contents at the top of the page where available. This allows you to navigate a manual by jumping to the section you are looking for.
This Dell PowerMaxOS 10 V10.0.0 Storage Replication Guide consists of sections like Table of Contents, to name a few. For easier navigation, use the Table of Contents in the upper left corner.
You can download Dell PowerMaxOS 10 V10.0.0 Storage Replication Guide free of charge simply by clicking the “download” button in the upper right corner of any manuals page. This feature allows you to download any manual in a couple of seconds and is generally in PDF format. You can also save a manual for later by adding it to your saved documents in the user profile.
To be able to print Dell PowerMaxOS 10 V10.0.0 Storage Replication Guide, simply download the document to your computer. Once downloaded, open the PDF file and print the Dell PowerMaxOS 10 V10.0.0 Storage Replication Guide as you would any other document. This can usually be achieved by clicking on “File” and then “Print” from the menu bar.