Veritas Storage Foundation 5.1 SP1: Storage and Availability Management for Oracle (5900-1504, April 2011)

See “About Database FlashSnap status information” on page 331.
■ 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
■ If you are performing offhost processing, you should use the
dbed_vmsnap command 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
Note the following points:
■ 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 SFDB
commands. (That is, the volumes were synchronized using VxVM 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.
■ 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 SFDB repository volume for an off-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 SFDB repository.
Note: You must issue commands as an Oracle database administrator in the
following procedure.
175Using Database FlashSnap for backup and off-host processing
FlashSnap commands