VSN Pools Directives

The VSN pools section of the archiver.cmd file starts with a vsnpools directive and ends either with an endvsnpools directive or with the end of the archiver.cmd file. This section names a collection of volumes.

VSN pools can also be configured with the SAM-QFS Manager software. See the SAM-QFS Manager online help for more information.

A VSN pool is a named collection of volumes. VSN pools are useful for defining volumes that can be available to an archive set. As such, VSN pools provide a useful buffer for assigning volumes and reserving volumes to archive sets. You can use VSN pools to define separate groups of volumes by departments within an organization, by users within a group, by data type, and according to other convenient groupings.

If a volume is reserved, it is no longer available to the pool in which it originated. Therefore, the number of volumes within a named pool changes as volumes are used. You can view the VSN pools by issuing the archiver command in the following format:

# archiver -lv | more

The syntax of a VSN pool definition is as follows:

vsn-pool-name media-type vsn-expr

The following example uses four VSN pools: users_pool, data_pool, proj_pool, and scratch_pool. A scratch pool is a set of volumes used when specific volumes in a VSN association are exhausted or when another VSN pool is exhausted. If one of the three specific pools is out of volumes, the archiver selects the scratch pool VSNs.

Example 12-20 VSN Pools

The following example shows an archiver.cmd file that uses four VSN pools.

vsnpools
users_pool mo ^MO[0-9][0-9]
data_pool mo ^DA.*
scratch_pool mo ^SC[5-9][0-9]
proj_pool mo ^PR.*
endvsnpools
vsns
users.1 mo -pool users_pool -pool scratch_pool
data.1 mo -pool data_pool -pool scratch_pool
proj.1 mo -pool proj_pool -pool scratch_pool
endvsns

For more information about VSN associations, see VSN Association Directives.