How Backup Uses Pools

The way you configure pools determines which volumes receive data. Each pool configuration contains a list of criteria that the data must meet for the data to be written to associated volumes. When you specify save sets to include in a pool, you can specify exact save set names, or you can use regular expression matching to send a group of save sets to a specific pool. For an example using regular expression matching, see "Example: Directing Client Indexes and Bootstrap to a Separate Pool ". For detailed information about regular expression matching, refer to the nsr_regexp man page.

When a scheduled backup occurs, Backup tries to match the save set to a pool configuration. If the save set matches the criteria of a pool configuration, Backup directs the save set to a labeled volume from that pool.

Backup then checks to see whether a correctly labeled volume is mounted on a storage device. If a correctly labeled volume is mounted on a storage device, Backup writes data to the volume. If a correctly labeled volume is not mounted on a storage device, Backup requests that such a volume be mounted and waits until an operator mounts the appropriate volume.