Recovery process

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G - Physics

06

F

G06F 17/30 (2006.01) G06F 11/14 (2006.01)

Patent

CA 2167794

An improved recovery method utilizes sequence numbers to order log records and reduce the excess compensating actions due to a failure during recovery. Next undo records are written to the log after a preset number of compensating actions which include the sequence number of the record currently being scanned. After a failure, all records between the next undo record and the record having the sequence number included in the next undo record are ignored during when the log is scanned backwards.

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