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

■ Storage must be configured as specified:
See “Preparing hosts and storage for Database FlashSnap”
on page 130.
■ You must be the Oracle database administrator.
■ The disk group must be version 110 or later. For more information
on disk group versions, see the vxdg(1M) manual page.
■ Be sure that a DCO and DCO volume are associated with the volume
for which you are creating the snapshot.
■ Snapshot plexes and their associated DCO logs should be on
different disks than the original plexes, and should be configured
correctly for creating snapshots by the system administrator.
■ Persistent FastResync must be enabled on the existing database
volumes and disks must be assigned for the snapshot volumes.
■ The database must be running in archive log mode. Archive log
mode is set in the Oracle initialization parameter file.
■ The Oracle database must have at least one mandatory archive
destination.
■ ORACLE_HOME cannot reside on the disk which will be used for
snapshot.
■ The Oracle database files and archive log files should use different
volumes with unique disks in same disk group.
Prerequisites
■ If you are performing offhost processing, the snapplan should be
created on the primary host.
■ After creating the snapplan using the dbed_vmchecksnap
command, you can use a text editor to review and update the file,
if necessary.
■ It is recommended that you create a local working directory to
store your snapplans in.
■ See the dbed_vmchecksnap (1M) online manual page for more
information.
■ If the SNAPSHOT_MODE for the database is set to online, the
primary and secondary hosts can be the same.
■ If the SNAPSHOT_MODE is set to offline or instant, the primary
and secondary hosts must be different.
Usage Notes
To create a snapplan
1
Log in as the Oracle database administrator.
2
Change directories to the working directory you want to store your snapplan
in.
$ cd /working_directory
161Using Database FlashSnap for backup and off-host processing
FlashSnap commands