VERITAS Volume Manager 3.5 Administrator's Guide (September 2004)

Configuring Off-Host Processing
Implementing Off-Host Processing Solutions
Chapter 11382
If required, use the nmirrors attribute to specify the number of mirrors
in the snapshot volume.
If a database spans more than one volume, specify all the volumes and
their snapshot volumes on the same line, for example:
# vxassist -g dbasedg snapshot vol1 snapvol1 vol2 snapvol2 \
vol3 snapvol3
Step 7. On the primary host, release the tables from hot backup mode.
Step 8. On the primary host, 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
Step 9. On the primary host, deport the snapshot volume’s disk group using the
following command:
# vxdg deport snapvoldg
Step 10. On the OHP host where the replica database is to be set up, use the
following command to import the snapshot volume’s disk group:
# vxdg import snapvoldg
Step 11. The snapshot volume is initially disabled following the split. Use the
following commands on the OHP host to recover and restart the snapshot
volume:
# vxrecover -g snapvoldg -m snapvol
# vxvol -g snapvoldg start snapvol
Step 12. On the OHP host, check and mount the snapshot volume. The following
are sample commands for checking and mounting a file system:
# fsck -F vxfs /dev/vx/rdsk/snapvoldg/snapvol
# mount -F vxfs /dev/vx/dsk/snapvoldg/snapvol mount_point
Step 13. On the OHP host, use the appropriate database commands to recover
and start the replica database for its decision support role.
When you no longer need the replica database, or you want to
resynchronize its data with the primary database, you can reattach the
snapshot plexes with the original volume as described below: