Use the vxrvg checkstart command to mark the Replicator Log volume that is associated with the specified RVG with a start mark to indicate the point from which the data needs to be replicated. Any updates to any of the data volumes subsequent to the checkstart are logged in the Replicator Log volume until you run the vxrvg checkend command. The -c option is mandatory and is used to specify a checkpoint string which is associated with the start and end marks in the Replicator Log volume. Use this command before starting the backup of the Primary data.

The vxprint -l rvg command displays the last checkpoint that was written to the Replicator Log. However, all the checkpoints still exist in the Replicator Log volume until the entries that are written to the Replicator Log volume wrap around or are overwritten or intentionally deleted.

The checkstart and checkend marks indicate the series of updates that the Secondary must receive for it to become consistent. The Secondary is inconsistent when it receives these updates and cannot be used for migration or takeover during this period.

Syntax for vxrvg checkstart

vxrvg [-c<checkpoint>] [-g<diskgroup>] checkstart <rvg>

Example

vxrvg -g vvrdg -c checkpoint checkstart rvg