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Browse Prior Art Database

Including Transition Rules in Management Class Definition

IP.com Disclosure Number: IPCOM000100351D
Original Publication Date: 1990-Apr-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 1 page(s) / 39K

Publishing Venue

IBM

Related People

Clark, CM: AUTHOR [+3]

Abstract

This article discloses a system-managed storage (SMS) facility that allows the SMS constructs assigned to a data object to change according to predefined criteria.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 84% of the total text.

Including Transition Rules in Management Class Definition

       This article discloses a system-managed storage (SMS)
facility that allows the SMS constructs assigned to a data object to
change according to predefined criteria.

      The Data Facility Product (DFP) introduced the system-managed
storage environment to help automate and optimize storage management.
 DFSMS classified data objects when they entered the system.  The
object's storage class identified its service level requirements.
The object's management class included its availability and retention
characteristics.  The storage class and management class were static.
 There was no provision in the class definitions allowing the
object's classification to change. Class changes could be made
through the writing and execution of program procedures, but the
rules for the changes would be implicit in the programs.

      DFP support of objects extends the DFP class concepts by adding
transition criteria to the management class.  The transition criteria
allow the reclassification of an object according to the object's
age, its reference characteristics, or periodic calendar dates.  The
concept includes the means to provide downward, upward, or cyclic
transitions within a storage hierarchy by changing an object's
storage class, as well as providing for change of management class
(from active to inactive, for example.)

      A sample management policy is:
o    Store a new object on DASD and...