Invention Grant
- Patent Title: Continuous data protection
- Patent Title (中): 持续数据保护
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Application No.: US11196721Application Date: 2005-08-03
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Publication No.: US07653800B2Publication Date: 2010-01-26
- Inventor: Ofir Zohar , Yaron Revah , Haim Helman , Dror Cohen , Shemer Schwartz
- Applicant: Ofir Zohar , Yaron Revah , Haim Helman , Dror Cohen , Shemer Schwartz
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Griffiths & Seaton PLLC
- Main IPC: G06F13/16
- IPC: G06F13/16

Abstract:
A method for continuous data protection in a storage system, including receiving a first write command to write first data to a partition of a logical volume and then generating a first partition descriptor record (PDR) having a first timestamp. The method further includes storing the first data at a first location, associating the first PDR with the first location, and receiving a second write command, subsequent to the first command, to update the first data with second data. Responsively to the second command, a second PDR having a second timestamp is generated. The second data is stored at a second location, and the second PDR is associated with the second location. The method includes generating a pointer between the first PDR and the second PDR, and accessing the first PDR using the pointer in response to a read command indicating a time prior to the second timestamp.
Public/Granted literature
- US20070033370A1 Continuous data protection Public/Granted day:2007-02-08
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