发明名称 |
File system snapshot with ditto address feature |
摘要 |
A system, method and computer readable medium for providing a file system snapshot with ditto address feature is disclosed. The method includes generating a file system snapshot wherein the snapshot is substantially empty. When metadata associated with a source file included in the snapshot is modified, the inode corresponding to the source file is copied to a shadow inode in the snapshot. When information is appended to a data block associated with a source file included in the snapshot, the inode corresponding to the source file is also copied to a shadow inode in the snapshot. When information in a data block associated with a source file included in the snapshot is overwritten or deleted, the inode corresponding to the source file is copied to a shadow inode in the snapshot and the original data block corresponding to the source file is copied to the snapshot.
|
申请公布号 |
US2003158863(A1) |
申请公布日期 |
2003.08.21 |
申请号 |
US20020077345 |
申请日期 |
2002.02.15 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
HASKIN ROGER L.;SAWDON WAYNE A.;SCHMUCK FRANK B.;WYLLIE JAMES C. |
分类号 |
G06F17/30;(IPC1-7):G06F12/00 |
主分类号 |
G06F17/30 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|