Replication Set - How To

Topics | How To | Related Topics

Create a Replication Set

Create a Replication set from a Replication Policy

Delete a Replication Set

Configure the Replication Set for Data Encryption

Enable or Disable Software Compression for a Replication Set

Add/Edit/Delete Filters for a Replication Set

Monitor Data Replication Activities

Start/Suspend/Resume/Abort Data Replication Activity

Add or Edit a Replication Pair

Create a Replication Set

You can use the Wizard to create a Replication Set instead of using the procedure below; to do so, right-click the ContinuousDataReplicator icon in the CommCell, and select Replication Set Creation Wizard.

Required Capability: Capabilities and Permitted Actions

To create a Replication Set:

1. In the CommCell Browser, right-click the ContinuousDataReplicator icon of the source machine, select All Tasks, then select Add Replication Set.
2. In the General tab, specify a name for the Replication Set, and a Destination Host that has CDR installed.

   For CDR on Windows, in the User Name field, specify a Windows User Account who has the following privileges:

   • Is a member of the local Administrators group on the destination.
   • Has read/write permissions to the product installation folders on the destination.
   • Has read/write permissions to the the replication logs directory on the destination if it is not in the default location.
   • Has read/write permissions to the Job Results directory.
3. In the Pre/Post Process tab, specify any commands to be run before a Recovery Point is created, and/or after one has been created, and specify a User Account with permissions to run the command(s) on the destination machine. For more information, see Pre/Post Processes.
4. In the Replication Options tab, make any appropriate selections. See the following for more information:
   • Enable or Disable Software Compression for a Replication Set
   • Configure the Replication Set for Data Encryption
   • Configure CDR Recovery Points
   • Configure CDR for Backups of Recovery Points
5. Optionally, make any appropriate selections in the Storage Policy tab. For more information about Recovery Points and backups, see Recovery Points.
6. In the Orphan Files tab, specify how to treat data on the destination, which is not on the source machine. (See Data Replication - Orphan Files.)
7. Optionally, select the minimum file size to perform hash comparisons, and the block size for hashing in the Advanced tab.
8. Optionally, filter the content of any Replication Pairs that are created for this Replication Set in the Filters tab. For more information about CDR Filters, see Replication Filters for ContinuousDataReplicator. To exclude data from data replication operations, do one of the following:
   • Click the Add button and, in the Enter Path window, type the complete path (including drive letter) of the file/folder/directory that you want to exclude from data replication. Repeat this step if you want to add more files/folders/directories to the filter.
   • Click the Browse button and expand the file system of the client computer. Click the file/folder/directory that you want to exclude from data replication and then click Add. Repeat this step for each additional entry.
9. To configure User Security, select the Security tab. For more information, see User Administration and Security.
10. Click OK to save your changes.

To configure User Security for the Replication Set, after it has been created, expand the ContinuousDataReplicator icon of the source machine, right-click the Replication Set and select Properties, then select the Security tab. For more information, see User Administration and Security. To specify that all Replication Pairs created for this Replication Set are to use a Common Base Folder (the same folder on the destination host to contain all destination paths) see Add or Edit a Replication Pair.

Delete a Replication Set

When you delete a Replication Set, all of the following are deleted as well:

• all its Replication Pairs
• all its Recovery Points
• all its mounted and shared snapshots

Required Capability: Capabilities and Permitted Actions

To delete a Replication Set:

1. Ensure that all Replication Pairs for the Replication Set you are deleting are in the "Aborted" or "New" state. If necessary, refer to Start/Suspend/Resume/Abort Data Replication Activity for instructions.
2. In the CommCell Browser, right-click a Replication Set icon, and select All Tasks, then select Delete.

   For CDR on UNIX, if Recovery Points were created for this Replication Set and any of the snapshots were mounted, select the Unmount and delete any manually-mounted snapshots before deleting replication set option.

3. Click OK in the confirmation screen.

Create a Replication Set from a Replication Policy

Before You Begin

• Review Replication Policy.

To create a Replication Set from a Replication Policy:

1. In the CommCell Browser, right-click the Agent icon of the source machine, select All Tasks, then select Add Replication Set From Policy.
2. In the Select a Policy dialog box, select the replication policy based on which you wish to create the replication set. The replication policies created for the corresponding agent will be displayed. Click OK.
3. In the Enter Name dialog box, specify the name of the replication set, and click OK.
4. The replication set will be created with the configurations available in the selected replication policy.

Configure the Replication Set for Data Encryption

Before You Begin

• Encryption settings made at the Replication Set level are for encryption of data between the source machine and the destination machine.
• Encryption must be enabled at the client level prior to configuring data encryption for a Replication Set residing on that client. See Configure the Client for Data Encryption.

Required Capability: Capabilities and Permitted Actions

To configure data encryption for a Replication Set:

1. From the CommCell Browser, right-click the Replication Set and select Properties.
2. From the Replication Set Properties (Replication Options) tab, either select or clear Encrypt During Data Transfer.
3. Click OK to save your settings and close the Replication Set Properties.

Enable or Disable Software Compression for a Replication Set

Related Topics

• Replication Compression

Before you Begin

• Compression settings made at the Replication Set level are for compression of data between the source computer and the destination computer.

Required Capability: Capabilities and Permitted Actions

To enable/disable software compression for a Replication Set:

1. From the CommCell Browser, right-click the Replication Set and select Properties.
2. From the Replication Set Properties (Replication Options) tab, either select or clear Compression ON.
3. Click OK to save your settings and close the Replication Set Properties.

Add/Edit/Delete Filters for a Replication Set

Related Topics:

• Replication Filters
• Replication Set
• Data Replication

Before You Begin

• When Filtering is edited for a Replication Set, any existing and active Replication Pairs will be automatically aborted and restarted to effect the change. If the newly configured filtering excludes files or folders that had previously been replicated, these files and folders on the destination(s) will be handled according to your Orphan Files settings.
• To configure filters for a new Replication Set, see Create a Replication Set.

Required Capability: Capabilities and Permitted Actions

To add/edit/delete a filter for a Replication Set:

1. In the CommCell Browser, right-click a Replication Set on the source machine, and select Properties.
2. In the Filters tab, specify the files and folders to filter from the content of any Replication Pairs that are created for this Replication Set. For more information, see Replication Filters.
3. Click OK to save your changes.

Monitor Data Replication Activities

The Data Replication Monitor only displays data replication activities for Replication Sets. All activity other than data replication activities, such as Recovery Point creation, is reflected in the Job Controller.

Monitor data replication activities

View details of data replication activities

View the failed files for a Replication Pair

Filter which clients' activities are displayed

Required Capability: Capabilities and Permitted Actions

To monitor data replication activities:

1. In the CommCell Browser, right-click the CDR icon, and select All Tasks, then select Data Replication Monitor.
2. In the Data Replication Monitor, all replication activities will be displayed for each Replication Pair. For more information about the States displayed, see Monitoring Data Replication.

To view details of data replication activities for a Replication Pair:

1. In the Data Replication Monitor, right-click any Replication Pair, and select Details.
2. The Pair Activity will be displayed with additional details about the job.

To view the failed files for a Replication Pair:

1. In the Data Replication Monitor, right-click any Replication Pair, and select View Failed Files.
2. If any failed files have been logged for this Replication Pair, they will be displayed.

To filter which clients' activities are displayed:

1. In the Data Replication Monitor, right-click any Replication Pair, and select Filters.
2. In the Filter Operations dialog box, select from the following:
   • Select an existing filter from the Filters list. (You can click the View Filter Details button to see which clients each filter is configured to monitor.)
   • Click the Create a New Filter button. In the Create a New Filter dialog box, select the clients to be monitored and click OK.
3. Click Apply and then click Close.
4. The Data Replication Monitor will now show activities only for the Replication Pairs for the clients defined in your selected filter.

Start/Suspend/Resume/Abort Data Replication Activity

Related Topics:

• Monitoring Data Replication

Before You Begin

• From the Replication Set level, if you suspend one Replication Pair, a prompt will ask if you want all Replication Pairs to be suspended. If you choose to do so, all Replication Pairs on that source computer which use the same destination computer will be placed in the Paused state, even those that are in different Replication Sets. When you Resume any one of the Replication Pairs that was placed in the Paused state, a prompt will ask if you want all Pairs to be resumed. If you choose to do so, all the Replication Pairs that were placed in the Paused state will Resume, and be placed back in the same state they were in previously.

Required Capability: Capabilities and Permitted Actions

To change the state of a Replication Pair:

Select one of the following methods:

• In the CommCell Browser, right-click a Replication Pair, and select Start, Start Full Resync, Suspend, Resume, or Abort.

  From the Replication Pair level, you cannot Suspend a Replication Pair that is in the Replicating state; instead, do this from the Replication Set level.

• You can also change the state of one or more Replication Pairs at once from the Replication Set level.
  1. In the CommCell Browser, right-click a Replication Set in the source machine, and select All Tasks, then select Change State.
  2. In the Change States screen, select the Replication Pair(s), and click Start, Start Full Resync, Suspend, Resume, or Abort.
  3. When your changes are complete, click Close.

To suspend all data replication activity for a Replication Set:

1. In the CommCell Browser, right-click a Replication Set in the source machine, and select All Tasks, then select Suspend Data Transfer.
2. Data replication activities are suspended for all Replication Pairs in the Replication Set.

To restart data replication activities, use the procedures above to start activity for one or more Replication Pair(s).

Add or Edit a Replication Pair

Before You Begin

• You can only edit a Replication Pair whose state is Stopped, New Pair, or Failed. See Monitoring Data Replication and Start/Suspend/Resume/Abort Data Replication Activity.

Required Capability: Capabilities and Permitted Actions

To add or edit a Replication Pair:

1. In the CommCell Browser, right-click a Replication Set in the source machine, and select All Tasks, then select Manage Pairs.
2. Select one of the following:
   • To add a Replication Pair, in the Manage Pairs dialog, perform the following:
     • Optionally, specify a Common Base Folder so that all destination paths for all Replication Pairs in the Replication Set will be created in the same location on the destination host.
     • For File System data, click Add. In the Add Replication Pair dialog box, type, or click Browse to navigate to and select, a source volume or directory for the Source Path and Destination Path fields, then click OK.

       See Data Replication - Best Practices for a note about destination volume sizes. If you are using QSnap with CDR on UNIX, see QSnap for ContinuousDataReplicator for information about the creation and selection of CXBF devices.

     • For application data, click Add App; in the Add Applications dialog, select all of the directories associated with the application data to be replicated, and click OK. For more information about replicating application data, see Application Integration.

       Add App discovers the location of system databases on the client, as well as user-defined databases (.mdf, .ndf, .ldf), which you can select for data replication. SQL volumes will not be discovered if any databases are in the suspect or loading state. Use the SQL Enterprise Manager to change the mode of the database(s). For Oracle: If there is more than one log file destination, CDR will discover all of them, and create all the necessary Replication Pairs. Ensure that all ARCHIVE_LOG_DEST_n for the Oracle database are set to a path, not a parameter, or the Oracle discovery may fail. Correct example, set to a path: ALTER SYSTEM SET LOG_ARCHIVE_DEST_10 = 'LOCATION=F:\backup2\logs'; Incorrect example, set to a parameter: ALTER SYSTEM SET LOG_ARCHIVE_DEST_10 = USE_DB_RECOVERY_FILE_DEST;

   • To edit a Replication Pair, in the Manage Pairs dialog, select the new Pair or one to edit, click Edit, make any changes in the Replication Pair dialog box, and click Close.
3. To specify that additional Replication Pairs are to be created for mount points that are part of your selected source volume or directory, select Automatically detect mount points. Mount points will be ignored if this option is not selected.
4. When your changes are complete, click Apply.

Filtering of content for Replication Pairs is configured at the Replication Set level; see Replication Filters.

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