Administering Checkpoints

A checkpoint is a user-defined marker in the SRL that can be used to synchronize the Secondary when the application is active, or to restore the Secondary data volumes from backup. For information on using checkpoints for synchronization, see Synchronizing the Secondary and Starting Replication. For information on using checkpoints for backing up and restoring a Secondary, see Backing Up the Secondary.

This section describes how you can work with checkpoints. For general information about checkpoints, see Understanding Checkpoints.

Creating Checkpoints

VVR enables you to create Primary and Secondary checkpoints. The Primary checkpoints are associated with an RVG. However, Secondary checkpoints are associated with an RLINK. VVR allows you to create a maximum of 46 checkpoints.

  To create a Primary checkpoint

The argument checkpt_name is the name that you choose to specify for the checkpoint.

  To create a Secondary checkpoint

The argument checkpt_name is the name that you choose to specify for the checkpoint.

Ending Checkpoints

The end of the checkpoint, or checkend, marks the position in the SRL for the end of a process such as synchronization or backup. When you are ready to end the checkpoint, for example, when the backup is complete, end the checkpoint in the SRL.

  To end a Primary checkpoint

  To end a Secondary checkpoint

For a Secondary checkpoint, resume replication to the Primary.

The checkpoint will end when the resume operation starts. For more information about using Secondary checkpoints, see Backing Up the Secondary.

Viewing Checkpoints

Primary checkpoints are associated with an RVG. You can display the list of Primary checkpoints by using the vxrvg cplist command.

Secondary checkpoints on the other hand are associated with an RLINK. You can display the list of Secondary checkpoints by using the vxrlink cplist command on the Primary.

For more information on these commands, refer to Displaying a List of Checkpoints.

Deleting Checkpoints

After you have finished using the checkpoints, you can delete the checkpoints. VVR allows you to retain a maximum of 46 checkpoints. To create any new checkpoint, delete an earlier checkpoint that you no longer require.

  To delete a Primary checkpoint

The argument rvg_name is the name of the Primary RVG for which the checkpoint is to be deleted.

The argument checkpt_name is the name of the specific checkpoint to be deleted.

  To delete a Secondary checkpoint

Note that this command must be run only on the Primary.

The argument rlink_name is the name of the RLINK for which the checkpoint is to be deleted.

The argument checkpt_name is the name of the specific checkpoint to be deleted.