Veritas Storage Foundation™ 5.0.1 for Oracle RAC Installation, Configuration, and Administrator's Guide Extracts for the HP Serviceguard Storage Management Suite on HP-UX 11i v3

NOTE: You cannot access Database FlashSnap commands (dbed_vmchecksnap, dbed_vmsnap,
and dbed_vmclonedb) with the VxDBA menu utility.
Table 5-7 Create Snapshot Notes
• You must be logged in as the Oracle database administrator.
• You must create and validate a snapplan using dbed_vmchecksnap before you can create
a snapshot image with dbed_vmsnap.
Prerequisites
• The dbed_vmsnap command can only be used on the primary host.
• Do not share volumes between Oracle database files and other software.
• When creating a snapshot volume, create the snapshot on a separate controller and on
separate disks from the primary volume.
• Make sure your archive log destination is separate from your Oracle database volumes.
• Do not place any datafiles, including control files, in the $ORACLE_HOME/dbs directory.
• Resynchronization speed varies based on the amount of data changed in both the primary
and secondary volumes when the mirror is broken off.
• See the dbed_vmsnap(1M) manual page for more information.
Usage Notes
To create a snapshot
1. Change directories to the working directory in which your snapplan is stored:
#cd /working_directory
2. If SNAPSHOT_MODE is set to offline in the snapplan, shut down the database.
3. Create the snapshot image using the dbed_vmsnap command:
# /opt/VRTS/bin/dbed_vmsnap -S ORACLE_SID -f SNAPPLAN -o snapshot
[-F]
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.
NOTE: 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.
You can also create another Oracle database for decision-support purposes.
• 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 2006-03-02 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.
Creating a Snapshot (dbed_vmsnap) 73