VERITAS Storage Foundation 4.1 Intelligent Storage Provisioning Administrator's Guide

Chapter 1, Understanding ISP

ISP Concepts

Note Only one data pool can be created within a disk group.

It should not usually be necessary to move a data pool to another disk group. However, if

this is required, only an entire data pool can be moved. An individual application volume

within a data pool cannot be moved. If you want to move a data pool into a different disk

group, you must ensure that the data pool contains only those objects that you require.

Clone Pool

A storage pool that contains one or more full-sized instant volume snapshot replicas of volumes

within a data pool. (A volume snapshot is an image of a volume’s contents at the moment in time

that the snapshot was taken. See the VERITAS Volume Manager Administrator’s Guide for more

information about volume snapshots.)

Note Only full-sized and space-optimized instant snapshots are supported for use with ISP.

Third-mirror break-off volume snapshots are not supported.

A clone pool can be moved into another disk group, but an individual snapshot within it

cannot. If you want to move a clone pool into a different disk group, you must ensure that the

clone pool contains only those snapshots that you require.

Storage Pool Set

A storage pool set is a bundled definition of the capabilities of a data pool and its clone pools. For

convenience, you can use a storage pool set definition to define both pools in a single operation.

See “Storage Pool Sets” on page 175 for details of the storage pool sets that are provided.

Policy

A storage pool’s policies define how it behaves when more storage is required, and when you try to

create volumes whose capabilities are not permitted by the current templates. The two policies that

are associated with a storage pool are:

AutoGrow Defines how a storage pool uses LUNs. This policy can take the

following level values:

pool Use storage that has been manually assigned to the

storage pool.

diskgroup Use storage that has been assigned to the disk group.

SelfSufficient Defines how a storage pool uses templates. This policy can take the

following level values: