Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

3
Use the following command to make a full-sized snapshot, snapvol, of the
tablespace volume by breaking off the plexes that you added in step 1 from
the original volume:
# vxsnap -g volumedg make \
source=volume/newvol=snapvol/nmirror=N \
[alloc=storage_attributes]
The nmirror attribute specifies the number of mirrors, N, in the snapshot
volume.
If a database spans more than one volume, specify all the volumes and their
snapshot volumes as separate tuples on the same line, for example:
# vxsnap -g dbasedg make source=vol1/newvol=svol1 \
source=vol2/newvol=svol2 source=vol3/newvol=svol3 \
alloc=ctlr:c3,ctlr:c4
This step sets up the snapshot volumes ready for the backup cycle, and starts
tracking changes to the original volumes.
4
Release all the tablespaces or databases from suspend, hot backup or quiesce
mode:
■ As the DB2 database administrator, use a script such as that shown in the
example.
See “Script to resume I/O for a DB2 database” on page 518.
■ As the Oracle database administrator, release all the tablespaces from hot
backup mode using a script such as that shown in the example.
See “Script to end Oracle database hot backup mode” on page 517.
■ As the Sybase database administrator, release the database from quiesce
mode using a script such as that shown in the example.
See “Script to release a Sybase ASE database from quiesce mode”
on page 517.
5
On the primary host, use the following command to split the disks containing
the snapshot volumes into a separate disk group, snapvoldg, from the original
disk group, volumedg:
# vxdg split volumedg
snapvoldg
snapvol ...
163Online database backup
Making an off-host backup of an online database