Storage apparatus and duplicate data detection method
AssigneesHitachi, Ltd., Hitachi Information & Telecommunication Engineering, Ltd.
InventorsTaketoshi Sakuraba, Taizo Hori, Naomitsu Tashiro
Life of this patent
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Abstract
An optimum chunk cutout method is selected according to the type of content. A storage apparatus is a storage apparatus for storing content in a backup volume in response to a content storage request from a host system connected to the storage apparatus via a network and includes a chunk cutout unit for cutting out the content into one or more chunks and a duplication judgment unit for managing a duplicate state of the chunk or chunks which have been cut out by the chunk cutout unit; wherein the chunk cutout unit selects a method for cutting out the chunk based on content type identification information indicating a type of the content.
Claims18
A storage apparatus for storing content in a backup volume in response to a content storage request from a host system connected to the storage apparatus via a network, the storage apparatus comprising:
- a chunk cutout unit for cutting out the content into one or more chunks;
- and
- a duplication judgment unit for managing a duplicate state of the chunk or chunks which have been cut out by the chunk cutout unit;
- wherein the content has management information and data, and the management information is attached to the content and is based on properties of the content and indicates a type of the content, and
- wherein the chunk cutout unit distinguishes between the management information and the data and selects a method for cutting out the chunk based on the management information.
A duplicate data detection method using a storage apparatus for storing content in a backup volume in response to a content storage request from a host system connected to the storage apparatus via a network,
- the duplicate data detection method comprising:
- a first step executed by a chunk cutout unit cutting out the content into one or more chunks;
- and
- a second step executed by duplication judgment unit managing a duplicate state of the chunk or chunks which have been cut out in the first step;
- wherein the content has management information and data, and the management information is attached to the content and is based on properties of the content and indicates a type of the content, and
- wherein in the first step, the chunk cutout unit distinguishes between the management information and the data and selects a method for cutting out the chunk based on the management information.
Dependencies are inferred from the claim text.