System and method for restoring a file system from backups in the presence of deletions
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United States of America Patent
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Aug 30, 2005
Grant Date -
Aug 28, 2003
app pub date -
Feb 22, 2002
filing date -
Feb 22, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
'A system and associated method restore a file system from incremental backups in the presence of deletion, without restoring deleted files. This is accomplished by logging deletions in a deletion log. Using the deletion log, the system re-deletes the deleted files upon a restore operation to an incremental backup epoch. The system the logs deletions so that the files that were deleted and survived a backup epoch have their records logged. The activity log enables an incremental backup from a prior snapshot, and represents a point-in-time version of the file system. The system can either not restore the deleted files, or, alternatively, it can restore the deleted files and then re-deletes them.'
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