The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2022
Filed:
Mar. 10, 2022
Hitachi, Ltd., Tokyo, JP;
Takaki Matsushita, Tokyo, JP;
Yusuke Yamaga, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
In a storage system, processing related to data replication includes associating first control information with a logical volume and a snapshot and second control information with data on a pool volume. Data of the logical volume and the snapshot is managed by associating the first control information with the second control information. A time series of the logical volume and one or more snapshots is managed using generation information associated with the first control information, for each piece of data on the pool volume. Generation information indicating a generation in which the data is created is managed in association with the second control information. Invalidation of the first and second control information asynchronously with a processing of data related to the logical volume and the snapshot is executed. Whether the invalidation is possible is determined by referring to the generation information associated with the first and second control information.