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

Table 10-2
Parameter values for dbed_vmchecksnap (continued)
ValueParameter
Specifies the database snapshot mode. Values can be
online, offline, or instant.
■ If the snapshot is created while the database is
online, the dbed_vmsnap command will put the
tablespaces into backup mode. After dbed_vmsnap
finishes creating the snapshot, it will take the
tablespaces out of backup mode, switch the log files
to ensure that the extra redo logs are archived, and
create a snapshot of the archived logs.
■ If the database is offline, it is not necessary to put
the tablespaces into backup mode. The database
must be shut down before creating an offline
snapshot.
■ If the database snapshot is instant, dbed_vmsnap
will skip putting the tablespace into backup mode.
Note: If SNAPSHOT_MODE is set to offline or instant,
an off-host configuration is required and the -r
relocate_path option is not allowed.
Note: The offline and instant snapshot modes are not
supported for Oracle RAC.
SNAPSHOT_MODE
The default value is database and cannot be changed.
Specifies the database object for which you want to
create a snapshot.
SNAPSHOT_PLAN_FOR
Specifies the snapshot plex tag. Use this variable to
specify a tag for the plexes to be snapshot. The
maximum length of the plex_tag is 15 characters. The
default plex tag is dbed_flashsnap.
SNAPSHOT_PLEX_TAG
Specifies the snapshot volume prefix. Use this variable
to specify a prefix for the snapshot volumes split from
the primary disk group. A volume name cannot be more
than 32 characters. You should consider the length of
the volume name when assigning the prefix.
SNAPSHOT_VOL_PREFIX
159Using Database FlashSnap for backup and off-host processing
FlashSnap commands