Veritas Storage Foundation 5.0 for Oracle RAC Configuration Guide Extracts for HP Serviceguard Storage Management Suite, Second Edition, May 2008

Using FlashSnap for Backup and Recovery

Creating a Snapplan (dbed_vmchecksnap)

Chapter 5

When you first run dbed_vmchecksnap, use the -o setdefaults option to create a

snapplan using default values for variables. You may then edit the file manually to set

the variables for different snapshot scenarios.

NOTE You cannot access Database FlashSnap commands (dbed_vmchecksnap, dbed_vmsnap,

and dbed_vmclonedb) with the VxDBA menu utility.

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.

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

is 1.

Table 5-3 Parameter Values for dbed_vmchecksnap (Continued)

Parameter Value