Creating a split-mirror snapshot of the database


Creating a split-mirror snapshot of the database
Prev	Example of quick recovery of an Oracle database	Next

The following figure shows the snapshot step. The arrow pointing back to the original volume indicates that the snapshot volume can be rejoined to the original volume, updated, and ready to create a refreshed snapshot.

Figure: Creating a backup of the database with a snapshot

The following procedure describes how to create a snapshot of the database and save it for later use. The snapshot process is most beneficial when done on a periodic basis.

To create a snapshot of the Oracle datafile volume

Open the Oracle database and verify that the tablespace you want to work with is running normally.
In the VEAGUI, prepare the volume that contains the datafile of the tablespace.
Optionally, use the following command:
```
vxassist -g<DynamicDiskGroupName> snapstart <DriveLetter>
```
In Oracle, ALTER the tablespace with the BEGIN BACKUP option to prepare the database logs for backup creation mode.
In the VEA GUI, click the Snap Shot button to create a snapshot of the Oracle datafile volume.
Optionally, use the following command:
```
vxassist -g<DynamicDiskGroupName> snapshot <DriveLetter>
```
In Oracle, ALTER the tablespace with the END BACKUP option to set the database logs to normal mode.
In Oracle, archive the current database log to keep it at the same level as the snapshot.

To resume normal processing with the Oracle datafile

In Oracle, update the tables in the tablespace to create database log activity.