VERITAS Storage Foundation 4.1 Oracle Administrator's Guide

Creating a Snapshot (dbed_vmsnap) Prerelease 8 September 2005, 8:55am
234 VERITAS Storage Foundation for Oracle Administrator’s Guide
2. If SNAPSHOT_MODE is set to offline in the snapplan, shut down the database.
3. Create the snapshot image using the command:
$ /opt/VRTS/bin/dbed_vmsnap -S ORACLE_SID -f SNAPPLAN \
-o snapshot
Note To force snapshot creation, use the -F option. The -F option can be used after a snapshot
operation has failed and the problem was fixed without using VERITAS Storage Foundation
for Oracle commands. (That is, the volumes were synchronized without using VERITAS
Storage Foundation for Oracle commands.) In this situation, the status of the snapplan will
appear as unavailable for creating a snapshot. The -F option ignores the unavailable status,
checks for the availability of volumes, and creates the snapshot after the volumes pass the
availability check.
Note After the snapshot is created, dbed_vmsnap returns values you will need to run
dbed_vmclonedb. These values include the snapshot disk group, the snapplan name, and
the VxDBA repository volume for a two-host configuration. Make a note of these values so
you have them when running dbed_vmclonedb.
You can also use the command dbed_vmchecksnap -f snapplan -o list to
access the information regarding the snapshot disk group, the snapplan name, and the
VxDBA repository.
The snapshot volumes now represent a consistent backup copy of the database. You can backup the
database by copying the snapshot volumes to tape or other backup media. For details, see “Backing
Up the Database from Snapshot Volumes (dbed_vmclonedb)on page 238. You can also create
another Oracle database for decision-support purposes. See “Cloning a Database
(dbed_vmclonedb)” on page 244 for more information.
For information on creating a snapshot using the GUI, see “Using the VERITAS Storage
Foundation for Oracle Graphical User Interface” on page 265.
Example
In this example, a snapshot image of the database, PROD, is created for a single-host configuration.
In this case, the SECONDARY_HOST parameter is set the same as the PRIMARY_HOST parameter
in the snapplan.
$ /opt/VRTS/bin/dbed_vmsnap -S PROD -f snap1 -o snapshot
dbed_vmsnap started at 2004-04-02 14:15:27
VxDBA repository is up to date.
The database is running in archivelog mode.
A snapshot of ORACLE_SID PROD is in DG SNAP_PRODdg.
Snapplan snap1 is used for the snapshot.