发明授权
- 专利标题： High-speed snapshot method
- 专利标题（中）： 高速快照方法
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申请号： US11454255申请日： 2006-06-16
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公开(公告)号： US07325112B2公开(公告)日： 2008-01-29
- 发明人: Yumiko Haruma , Koji Sugiyama , Kei Kubo , Yoshihito Yugami , Shinji Morita
- 申请人： Yumiko Haruma , Koji Sugiyama , Kei Kubo , Yoshihito Yugami , Shinji Morita
- 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： Townsend and Townsend and Crew LLP
- 优先权： JP2003-206170 20030806
- 主分类号： G06F12/06
- IPC分类号： G06F12/06 ; G06F17/30
摘要：
When a snapshot of data is taken, it is after a write request comes from the host equipment that old data on the source-side magnetic disk to the snapshot-side magnetic disk; therefore, it takes a long time before new data is actually written in the source-side magnetic disk. To overcome this problem, by analyzing data update information, and from a result of analysis, by deciding an area that has high possibility of receiving a request to write data, and having data of that area previously copied to the snapshot-side magnetic disk, it is possible to take a snapshot very quickly.
公开/授权文献
- US20060236051A1 High-speed snapshot method 公开/授权日：2006-10-19