发明授权
- 专利标题: Method for acquiring snapshot
- 专利标题(中): 获取快照的方法
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申请号: US10927137申请日: 2004-08-27
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公开(公告)号: US07325110B2公开(公告)日: 2008-01-29
- 发明人: Kei Kubo , Koji Sugiyama
- 申请人: Kei Kubo , Koji Sugiyama
- 申请人地址: JP Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Mattingly, Stanger, Malur & Brundidge, P.C.
- 优先权: JP2003-421955 20031219; JP2004-202564 20040709
- 主分类号: G06F12/00
- IPC分类号: G06F12/00 ; G06F12/16
摘要:
In a storage switch to control a snapshot operation in the file unit, the delay in the writing operation of a host due to a data saving operation is prevented. In a snapshot acquiring method, the memory usage in a switch is reduced to create a snapshot. The storage switch includes a function to create a snapshot of a file. To prevent occurrence of delay due to the data saving operation, a mirror of source data as a snapshot target is kept in a source volume in any situation or according to a predetermined condition with synchronization established between the mirror and the source data. In the creation of the snapshot, the mirror data is used. By creating the mirror data in sequential positions in the source volume, the positional correspondence between the source side and the snapshot side is simplified.
公开/授权文献
- US20050138312A1 Method for acquiring snapshot 公开/授权日:2005-06-23