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

Create a mirror of a volume:

# vxsnap -g diskgroup addmir volume_name alloc=diskname

Example of creating 3 mirrors for a particular volume:

# vxsnap -g diskgroup addmir datavol \

nmirror=3 alloc=disk1,disk2,disk3

List the available mirrors:

# vxprint -g diskgroup -F%name -e"pl_v_name in \"volume_name\""

Enable database FlashSnap to locate the correct mirror plexes when creating

snapshots:

■ Set the dbed_flashsnap tag for the data plex you want to use for breaking

off the mirror. You can choose any tag name you like, but it needs to match

the tag name specified in the snapplan.

# vxedit -g diskgroup set putil2=dbed_flashsnap plex_name

■ Verify that the dbed_flashsnap tag has been set to the desired data plex:

# vxprint -g diskgroup -F%name -e"pl_v_name in \

\"volume_name\" && p2 in \"dbed_flashsnap\""

If you require a backup of the data in the snapshot, use an appropriate utility

or operating system command to copy the contents of the snapshot to tape

or to some other backup medium.

Example procedure to create a snapshot mirror of a volume

This example shows the steps involved in creating a snapshot mirror for the

volume data_vol belonging to the disk group PRODdg.

Using Database FlashSnap for backup and off-host processing

Preparing hosts and storage for Database FlashSnap

136