Browse Prior Art Database

Using Pending Action Date to Control a Storage Management Process

IP.com Disclosure Number: IPCOM000121458D
Original Publication Date: 1991-Sep-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 2 page(s) / 77K

Publishing Venue

IBM

Related People

Blount, MK: AUTHOR [+4]

Abstract

This article discloses an algorithm for selecting objects to be processed during an automatic storage management cycle in a system where the object storage is controlled by a storage management system.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Using Pending Action Date to Control a Storage Management Process

      This article discloses an algorithm for selecting objects
to be processed during an automatic storage management cycle in a
system where the object storage is controlled by a storage management
system.

      A large number of objects exist in a system where their storage
is controlled by a storage management system.  This storage
management system is controlled by a set of policies that govern the
storage of objects during their life cycle. In a system with a
variety of object types, numerous policies may be needed to provide
the necessary management. Storage management processing is required
when an object enters the system, is referenced, is explicitly
updated, moves from one stage or phase of its life cycle to the next,
or reaches the end of its life cycle.

      The first step in storage management is selecting objects to be
processed.  Object selection may require a number of steps as each
combination of object age and management policy is evaluated.  Each
selection step accesses many more objects than are actually selected,
since objects of a given age (30 days, for example) may only require
processing if they are under a specific management policy.  A simple
selection process is needed that allows objects with diverse criteria
to be selected in a single step and avoids the investigation of
numerous objects that are not selected.

      A single criterion, called the pending action date, is defined
for selecting objects for processing.  It is the date when the object
next requires storage management.  When storage management processing
occurs, objects with pending action dates of today or in the past are
selected for processing, while objects with future pending action
dates are not selected.

      The pending action date is calculated and st...