This section discusses the SMS constructs used by OAM and their
relationship with the automatic class selection (ACS) routines. OAM
defines the management policy parameters in the SMS constructs of
storage group, storage class, management class, and data class.
OAM associates these parameters with every object that it stores.
The storage administrator defines the associations through ACS routines.
The parameters include the following:
- Object retention rates
- The media on which OAM stores object collections
- Legal requirements for object retention
- Retrieval response time
- Location of object collections in the storage hierarchy
- How long OAM should hold the object collection at that level in
the hierarchy
- Number of backup copies required (0, 1 or 2)
- Whether the first backup copy is written at the time the object
is initially stored or during a subsequent storage management cycle
- The media type to which OAM should direct backup copies of objects
- Affiliation of libraries with relevant storage groups