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

Note that if the replica database must be able to be rolled forward (for
example, if it is to be used as a standby database), the primary database
must be in LOGRETAIN RECOVERY mode.
■ Oracle supports online backup by temporarily suspending updates to the
datafiles of the tablespaces, provided that the database is running in
archive mode and the tablespaces are online. As the Oracle database
administrator, put each tablespace into hot backup mode using a script
such as the example script.
See “Script to put an Oracle database into hot backup mode” on page 515.
■ Sybase ASE from version 12.0 onward provides the Quiesce feature to
allow temporary suspension of writes to a database. As the Sybase database
administrator, put the database in quiesce mode by using a script such as
the example script.
See “Script to quiesce a Sybase ASE database” on page 516.
If you are using Sybase ASE 12.5, you can specify the for external dump
clause to the quiesce command. This warm standby method allows you
to update a replica database using transaction logs dumped from the
primary database.
See “Updating a warm standby Sybase ASE 12.5 database” on page 192.
4
On the primary host, 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 snapshots svol1, svol2 and svol3:
# vxsnap -g dbasedg refresh svol1 source=vol1 \
svol2 source=vol2 svol3 source=vol3
5
If you temporarily suspended updates to volumes in 2, 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.
187Decision support
Creating an off-host replica database