Technique for accelerating the creation of a point in time prepresentation of a virtual file system
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United States of America Patent
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Sep 9, 2008
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N/A
app pub date -
Mar 8, 2005
filing date -
Jan 27, 2005
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Abstract
A technique for accelerating the creation of a hyperclone of a virtual file system. A hyperclone inode is copied from the base inode. Each indirect and direct block referenced by the base inode is also copied and the block pointers within the base inode are set to reference the copied direct data blocks. A CTW bit is set within each copied block that alerts the file system that the reference indirect or direct block is not to be deallocated.
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