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Improved Method to Backup and Recover Objects with More Than One Name

IP.com Disclosure Number: IPCOM000113830D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Halley, DR: AUTHOR [+6]

Abstract

Disclosed is a method that provides efficient and flexible backup and recovery of objects with more than one name using a sequential backup medium such as magnetic tape. By flexible, we mean the ability to recover an object by specifying any of its names. By efficient, we mean conserving the amount of tape movement, during both backup and recovery, since this is typically the most time consuming aspect.

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This is the abbreviated version, containing approximately 64% of the total text.

Improved Method to Backup and Recover Objects with More Than One Name

      Disclosed is a method that provides efficient and flexible
backup and recovery of objects with more than one name using a
sequential backup medium such as magnetic tape.  By flexible, we mean
the ability to recover an object by specifying any of its names.  By
efficient, we mean conserving the amount of tape movement, during
both backup and recovery, since this is typically the most time
consuming aspect.

      Backup and recovery is a means of protection against the loss
of the objects, their data, or their attributes.  Backup is the
process of making a copy of the objects and their attributes, and
recovery is the process of retrieving objects and attributes from the
backup copy.

      The method is to backup a single copy of the object.  First
backup all of the names associated with that object.  The names are
stored on the media in the order that the file system normally
presents them, along with information to identify the correct object
during the recovery process.  After all of the names for a given
object have been backed up then the object itself is backed up.

      Backing up a single copy of the object conserves the tape
movement that would be associated with making a copy of the object
for each name.  This applies to both the backup and recovery
processes.  Storing the object after all of the names allows any of
the names to be used to recover the object in a si...