This example shows implementing decision support using the instant full snapshot feature and the vxibc utility.
To use the instant full snapshot feature and the vxibc utility for decision support
# vxsnap -g hrdg prepare hr_dv01 # vxsnap -g hrdg prepare hr_dv02
This operation needs to be performed only for the first time you perform the snapshot operation.
# vxassist -g hrdg make dss-hr_dv01 volume_length # vxassist -g hrdg make dss-hr_dv02 volume_length
where volume_length is the length of the original volumes.
# vxsnap -g hrdg prepare dss-hr_dv01 # vxsnap -g hrdg prepare dss-hr_dv02
# vxibc -g hrdg regrecv dss_app hr_rvg [vxrvg -g hrdg -F -P dss \ snapshot hr_rvg]
The command vxrvg -g hrdg -F -P dss snapshot hr_rvg is run when the IBC message arrives on the Secondary and the command creates an instant full snapshot.
For information on the consistent state, see step 2.
# vxibc -g hrdg regsend dss_app hr_rvg
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 dss volumes and reattaches the snapshot plexes to their original volumes.