US 2014/0195749 A1 · Deduplication of Volume Regions

Abstract

A system and method for performing coarse-grained deduplication of volume regions. A storage controller detects that a first region of a first volume is identical to a second region of a second volume, wherein the first volume points to a first medium and the second volume points to a second medium. In response to detecting the identical regions, the storage controller stores an indication that the first range of the first medium underlies the second range of the second medium. Also in response to detecting the identical regions, the mappings associated with the second range of the second medium are invalidated.

Claims20

Dependent claims

A computer system comprising:

one or more storage devices;
and
a storage controller coupled to the one or more storage devices, wherein the storage controller is configured to:
maintain a medium mapping table to track relationships between underlying mediums and active mediums, wherein each underlying medium represents a snapshot;
and
responsive to detecting a first range of a first medium is identical to a second range of a second medium, store an indication that the first range of the first medium underlies the second range of the second medium.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/046,876Filed 4 Oct 2013

Priority

10 Jan 2013

Published

10 Jul 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification34 codes

G06F 3/065
Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems: replication mechanisms
G06F 3/0604
Specifically adapted to achieve a particular effect: improving or facilitating administration, e.g. storage management
G06F 3/0605
Improving or facilitating administration, e.g. storage management: by facilitating the interaction with a user or administrator
G06F 3/0608
Specifically adapted to achieve a particular effect: saving storage space on storage systems

Deduplication of Volume Regions

Life of this patent

Deduplication of Volume Regions

Life of this patent

Abstract

Claims20