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This window allows an administrator to manage tape migration policies and their subsystem-specific
overrides.
Subsystem-specific policies define migration rules to be applied on a subsystem basis instead of using the
default (basic) migration policy. When a migration run occurs and the storage class’s migration policy
does not have a subsystem-specific migration policy with the same subsystem ID, then the basic
migration policy will be applied; otherwise, the matching subsystem-specific migration policy will be
used. Click the Create Tape button on the Migration Policies window to create a new policy. To bring
up the configuration for an existing policy, select the policy from the list and click on the Configure
button.
Field Descriptions
Policy Name. The descriptive name of the migration policy.
Policy ID. A unique ID associated with the migration policy.
Runtime Interval. The number of minutes to wait between the end of one migration run and the start of
the next. This can be any positive value up to 1000000.
Last Read Interval. The number of minutes that must pass since a file was last read before it can
become a candidate for migration.
Last Update Interval. The number of minutes that must pass since a file was last written before it can
become a candidate for migration.
Migration Target. The desired percentage of free tape space to have available when migration is
completed. The migration will be terminated when this goal is reached or when no more files meet the
HPSS Management Guide November 2009
Release 7.3 (Revision 1.0) 186