Veritas Storage Foundation Intelligent Storage Provisioning 5.0 AdministratorÆs Guide, HP-UX 11i v3, First Edition, May 2008

175Changing the allocation behavior of ISP
For example, the default behavior of ISP (equivalent to setting
allocation_policy_order=7), A < S < T < D, means:
If a set of capabilities are specified for a volume during creation, ISP may find
that there are multiple sets of templates that provide the same set of
capabilities. These sets are referred to as template combinations. Some of the
available template combinations may provide additional capabilities (extraneous
capabilities) to those that were requested for the volume. By preferring not to
select a different template combination, you can avoid implicitly specifying the
extraneous capabilities. This assumes that you would request these capabilities
explicitly if you required them.
The templates that are associated with a storage pool define the characteristics
of the volumes that can be created in that pool. The selfsufficient policy of
the storage pool allows you to control whether ISP can redefine the pool
definition automatically, and, if so, to what extent.
T < D First, drop desired rules in preference to using a different template
combination.
S < T Secondly, use a different template combination in preference to adding
more templates to the storage pool.
A < S Finally, add more templates to the storage pool in preference to growing
the storage pool.