VERITAS Storage Foundation 4.1 Oracle Administrator's Guide

Chapter 10, Using Database FlashSnap for Backup and Off-Host Processing

Prerelease 8 September 2005, 8:55am Creating a Snapplan (dbed_vmchecksnap)

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SNAPSHOT_MODE online or offline or instant

Specifies whether the database snapshot should 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 if 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, a

two-host configuration is required and the -r

relocate_path option is not allowed.

SNAPSHOT_PLAN_FOR The default value is database and cannot be changed.

Specifies the database object for which you want to create a

snapshot.

SNAPSHOT_PLEX_TAG 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_VOL_PREFIX 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.

ALLOW_REVERSE_RESYNC yes or no

By default, reverse resynchronization is off (set equal to no). If it is

set to yes, data from the snapshot volume can be used to update the

primary volume.

SNAPSHOT_MIRROR Specifies the number of plexes to be snapshot. The default value is

Parameter Value