VERITAS FlashSnap Point-In-Time-Copy Solutions Administrator's Guide

Using Off-Host Processing to Back Up Cluster File Systems
42 VERITAS FlashSnap Point-In-Time Copy Solutions Administrator’s Guide
2. On the master node, refresh the contents of the snapshot volumes from the original volume
using the following command:
# vxsnap -g volumedg refresh snapvol source=vol \
[snapvol2 source=vol2]... syncing=yes
The syncing=yes attribute starts a synchronization of the snapshot in the background.
For example, to refresh the snapshot scfs_vol:
# vxsnap -g exampledg refresh scfs_vol source=cfs_vol syncing=yes
3. On the master node, use the following command to wait for the contents of the snapshot to be
fully synchronous with the contents of the original volume:
# vxsnap -g volumedg syncwait snapvol
For example, to wait for synchronization to finish for the snapshots scfs_vol:
# vxsnap -g exampledg syncwait scfs_vol
Note You cannot move a snapshot volume into a different disk group until synchronization of
its contents is complete. You can use the vxsnap print command to check on the
progress of synchronization.
4. On the master node, use the following command to split the snapshot volume into a separate
disk group, snapvoldg, from the original disk group, volumedg:
# vxdg split volumedg snapvoldg snapvol
For example, to place the snapshot of the volume cfs_vol into the shared disk group
splitdg:
# vxdg split exampledg splitdg scfs_vol
5. On the master node, deport the snapshot volume’s disk group using the following command:
# vxdg deport snapvoldg
For example, to deport the disk group splitdg:
# vxdg deport splitdg
6. On the OHP host where the backup is to be performed, use the following command to import
the snapshot volume’s disk group:
# vxdg import snapvoldg
For example, to import the disk group splitdg:
# vxdg import splitdg