Browse Prior Art Database

Changing Volume Expiration Dates When Data Expiration Dates Change

IP.com Disclosure Number: IPCOM000100348D
Original Publication Date: 1990-Apr-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Related People

Clark, CM: AUTHOR [+3]

Abstract

A program is disclosed that will allow the expiration dates to change for an optical disk volume.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 92% of the total text.

Changing Volume Expiration Dates When Data Expiration Dates Change

       A program is disclosed that will allow the expiration
dates to change for an optical disk volume.

      When an object (data) is entered into the system, it has an
expected lifetime that is used to determine an expiration date for
the data.  As data is written for storage to an optical disk volume,
the expiration date of the volume is determined from the expiration
date of the data to assure that the volume does not expire until all
the data has expired.  If there is a requirement to retain a data
object for a longer period of time, an explicit request is made to
assign the new expiration date.  The expiration date of the object is
compared to the expiration date of the optical volume.  If the
expiration date of the object is higher (later), the volume
expiration date is changed to that of the data.

      As time passes, objects and volumes eventually reach their
expiration dates.  When an object reaches its expiration date, it is
deleted, and further reference to the object is no longer possible.
When a volume reaches its expiration date, all objects must have
expired or there has been an error in previous processing.  A check
is made to select all objects that still reside on the volume.
Normally, the result will be that no objects are found. However, when
an object expiration date has changed, to prevent loss of data
pending follow-up by the storage administrator, the expiratio...