Veritas Volume Manager 5.1 SP1 Administrator"s Guide (5900-1506, April 2011)

4
On the primary host, link the snapshot volume in the snapshot disk group to
the data volume. Enter the following:
# vxsnap -g volumedg -b addmir volume mirvol=snapvol \
mirdg=snapvoldg
You can use the vxsnap snapwait command to wait for synchronization of
the linked snapshot volume to complete. Enter the following:
# vxsnap -g volumedg snapwait volume mirvol=snapvol \
mirdg=snapvoldg
This step sets up the snapshot volumes, and starts tracking changes to the
original volumes.
When you are ready to create a backup, go to step 5.
5
On the primary host, suspend updates to the volume that contains the
database tables. A database may have a hot backup mode that lets you do this
by temporarily suspending writes to its tables.
6
On the primary host, create the snapshot volume, snapvol, by running the
following command:
# vxsnap -g volumedg make \
source=volume/snapvol=snapvol/snapdg=snapvoldg
If a database spans more than one volume, you can specify all the volumes
and their snapshot volumes using one command, as follows:
# vxsnap -g dbasedg make \
source=vol1/snapvol=snapvol1/snapdg=sdg \
source=vol2/snapvol=snapvol2/snapdg=sdg \
source=vol3/snapvol=snapvol3/snapdg=sdg
7
On the primary host, if you temporarily suspended updates to a volume in
step 5, release all the database tables from hot backup mode.
8
On the primary host, deport the snapshot volume’s disk group using the
following command:
# vxdg deport snapvoldg
9
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
397Configuring off-host processing
Implemention of off-host processing solutions