Replication Pair - How To

Topics | How To | Related Topics

Add or Edit a Replication Pair

Delete a Replication Pair

Start/Suspend/Resume/Abort Data Replication Activity

Monitor Data Replication Activities

View Orphan Files

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:

In the CommCell Browser, right-click a Replication Set in the source machine, and select All Tasks, then select Manage Pairs.

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.

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.
When your changes are complete, click Apply.

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

Delete a Replication Pair

Before You Begin

You can only delete a Replication Pair whose state is Stopped or New Pair. See Monitoring Data Replication and Start/Suspend/Resume/Abort Data Replication Activity.
When you delete a Replication Pair, its Recovery Points are not deleted. See Delete a Recovery Point Using CDR.

Required Capability: Capabilities and Permitted Actions

To delete a Replication Pair:

Select one of the following methods:

In the CommCell Browser, right-click a Replication Pair, and select Delete.
In the CommCell Browser, right-click a Replication Set in the source machine, and select All Tasks, then select Manage Pairs. In the Manage Pairs screen, select a Replication Pair, and click Delete. When your changes are complete, click Close.

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:

In the CommCell Browser, right-click a Replication Set in the source machine, and select All Tasks, then select Suspend Data Transfer.
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).

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:

In the CommCell Browser, right-click the CDR icon, and select All Tasks, then select Data Replication Monitor.
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:

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

To view the failed files for a Replication Pair:

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

To filter which clients' activities are displayed:

In the Data Replication Monitor, right-click any Replication Pair, and select Filters.
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.
Click Apply and then click Close.
The Data Replication Monitor will now show activities only for the Replication Pairs for the clients defined in your selected filter.

View Orphan Files

Related Topics:

Data Replication - Orphan Files

Required Capability: Capabilities and Permitted Actions

To view the orphan files for a Replication Pair:

In the CommCell Browser, right-click the ContinuousDataReplicator icon on a source computer, and from All Tasks, select Data Replication Monitor.
In the Data Replication Monitor, right-click a Replication Pair and select View Orphan Files.