Invention Grant
- Patent Title: Integrated remote replication in hierarchical storage systems
- Patent Title (中): 分层存储系统中的集成远程复制
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Application No.: US12155149Application Date: 2008-05-30
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Publication No.: US08170990B2Publication Date: 2012-05-01
- Inventor: Hidehisa Shitomi
- Applicant: Hidehisa Shitomi
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Mattingly & Malur, P.C.
- Main IPC: G06F7/00
- IPC: G06F7/00 ; G06F17/00

Abstract:
Remote replication is implemented with hierarchical storage. In exemplary embodiments, a first storage site has a first storage system providing an upper tier of storage and a second storage system providing a lower tier of storage. A remote second storage site has third and fourth storage systems configured to receive remote replication from the first and second storage systems, respectively. When a file is migrated from the upper tier to the lower tier, a stub file is stored in place of the migrated file indicating a storage location of the migrated file on the second storage system. When copies of the migrated file and the stub file are replicated to the fourth and third storage systems, respectively, information is transmitted to the second storage site for linking the copy of the stub file at the third storage system to the copy of the migrated file at the fourth storage system.
Public/Granted literature
- US20090300079A1 Integrated remote replication in hierarchical storage systems Public/Granted day:2009-12-03
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