发明授权
- 专利标题： System and method for managing data versions in a file system
- 专利标题（中）： 用于管理文件系统中的数据版本的系统和方法
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申请号： US11008375申请日： 2004-12-09
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公开(公告)号： US07707165B1公开(公告)日： 2010-04-27
- 发明人: Tianyu Jiang , Narayana R. Tummala
- 申请人： Tianyu Jiang , Narayana R. Tummala
- 申请人地址： US CA Sunnyvale
- 专利权人： NetApp, Inc.
- 当前专利权人： NetApp, Inc.
- 当前专利权人地址： US CA Sunnyvale
- 代理机构： Cesari and McKenna, LLP
- 主分类号： G06F12/00
- IPC分类号： G06F12/00
摘要：
A system and method manages data versions in a file system. A data version field associated with a direct block pointer in each level 1 indirect block stores a data version associated with the data contained in the direct block. When data is modified subsequent to the creation of a persistent consistency point image, the data version is incremented to a next data version value to signify that the data has been modified. Replication is aided by the ease of identifying modified data blocks by examining the data version field associated with each block.
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