This example shows implementing decision support using the traditional snapshot feature and the vxibc utility.
To use the traditional snapshot feature and the vxibc utility for decision support
# vxibc -g hrdg regrecv dss_app hr_rvg vxrvg snapshot hr_rvg
# vxibc -g hrdg regsend dss_app hr_rvg
When the Secondary receives the IBC message, replication is frozen and no more data is written to the secondary data volumes.
The vxrvg snapshot command specified in step 1 then breaks-off the snapshot plexes from the Secondary data volumes, and replication starts again.
When the vxibc commands complete on both the hosts, the application name is unregistered.
If the RLINK is asynchronous and behind there may be a delay between the vxibc regsend and vxrvg snapshot command. During this delay, the application is running.
# vxrvg -g hrdg snapback hr_rvg
The reattach destroys the SNAP volumes and reattaches the snapshot plexes to their original volumes. If you have enabled FR on these volumes, only the blocks that were changed by the off-host processing application are resynchronized.