Restartable dump that produces a consistent filesystem on tapes
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United States of America Patent
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Apr 27, 2004
Grant Date -
N/A
app pub date -
Mar 12, 2001
filing date -
Mar 12, 2001
priority date (Note) -
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Abstract
The invention provides a method and system for performing a dump operation that preserves partial results of an aborted or interrupted dump, and allows restarting the dump from near where it was stopped. Thus, tapes from the original dump, plus tapes from the restarted dump, can be combined to provide a consistent subset of a filesystem. In a preferred embodiment, the dump operation is performed on a consistent recorded snapshot of the filesystem, so that the subset of the filesystem recorded on the tapes is itself consistent. As an emergent consequence, the dump operation is freely interruptable, restartable, and provides a set of tapes that maintain a consistent subset of the filesystem that is transparent to tape-restore operations and other operations to be performed on the filesystem as it was recorded on tape.
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