Resynchronizing the snapshot to your database


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Resynchronizing the snapshot to your database

When you have finished using a clone database or want to refresh it, you can resynchronize it with the original database. This is also known as refreshing the snapshot volume or merging the split snapshot image back to the current database image. After resynchronizing, the snapshot can be retaken for backup or decision-support purposes.

You can resynchronize the snapshot from the original volume.

Prerequisites

You must be logged in as the Oracle database administrator.
Before you can resynchronize the snapshot image, you must validate a snapplan and create a snapshot.
See Summary of database snapshot steps

See Validating a snapplan (dbed_vmchecksnap

See Creating a snapshot (dbed_vmsnap)
If a clone database has been created, shut it down and unmount the file systems using the dbed_vmclonedb -o umount command. This command also deports the disk group if the primary and secondary hosts are different.
See Shutting down the clone database and unmounting file systems
The Oracle database must have at least one mandatory archive destination.
See Establishing a mandatory archive destination

Usage Notes

The dbed_vmsnap command can only be executed on the primary host.
In a two-host configuration, the dbed_vmsnap command imports the disk group that was deported from the secondary host and joins the disk group back to the original disk group. The snapshot volumes again become plexes of the original volumes. The snapshot is then resynchronized.
See the dbed_vmsnap(1M) manual page for more information.

Note You cannot access Database FlashSnap commands (dbed_vmchecksnap, dbed_vmsnap, and dbed_vmclonedb) with the VxDBA menu utility.

To resynchronize the snapshot image

Use the dbed_vmsnap command as follows:
$ /opt/VRTS/bin/dbed_vmsnap -S ORACLE_SID -f SNAPPLAN -o resync

In this example, the snapshot image is resynchronized with the primary database.

$ /opt/VRTS/bin/dbed_vmsnap -S PROD -f snap1 -o resync

dbed_vmsnap started at 2006-03-02 16:19:05

The option resync has been completed.

dbed_vmsnap ended at 2006-03-02 16:19:26

Now, you can again start creating snapshots.


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