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Checkpoint pause/resume Secondary RLINK

If a Secondary data volume fails and there is a checkpoint backup created as outlined above, you can restore from this backup copy without having to do a full Primary resynchronization of all the volumes. This procedure is also referred to as doing an online restore for the Secondary, because it is not necessary to stop the Primary RVG to bring a new copy of the Secondary data volume up-to-date.

  Note   The names of existing Secondary checkpoints can be obtained by performing the vxrlink cplist command on the Primary. The vxrlink cplist command can also be used to monitor whether the earlier checkpoints are about to overflow.

The checkpoint string can be up to 19 characters long for either a Primary or a Secondary checkpoint. Only the most recent Primary checkpoint string is displayed in the Primary RVG.

Unlike a simple Secondary pause, a checkpoint Secondary pause will fail if the Secondary is disconnected from the Primary at the time the command is executed, because communication with the Primary is required to create the checkpoint.

 To create a Secondary checkpoint

On the Secondary:

1. Pause the RLINK using a checkpoint.

   # vxrlink -g diskgroup -c sec_checkpointname pause \

rlink_name

  Note   Pausing the RLINK with a checkpoint on the Secondary creates the Secondary checkpoint.

2. Back up all the volumes in the Secondary RVG, using a block-level backup.
3. Resume the RLINK.

   # vxrlink -g diskgroup resume rlink_name

 To delete a Secondary checkpoint

1. Pause the RLINK using a checkpoint on Secondary.

   # vxrlink -g diskgroup -c sec_checkpointname pause \

rlink_name

2. Delete the Secondary checkpoint, using the following command:

   # vxrlink -g diskgroup -c sec_checkpointname checkdelete \

rlink_name

  Note   Perform step 2 only on the Primary.