Using roll-forward and roll-backward logs to restore a data...

Details Using roll-forward and roll-backward logs to restore a data... Using roll-forward and roll-backward logs to restore a data...

2004-06-30

2009-11-17

Tsai, Sheng-Jen (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S162000

Reexamination Certificate

active

07620785

ABSTRACT:
A roll-back memory can be used to incrementally restore one or more data volumes in reverse chronological order to the data state they occupied at some prior point in time without using a backup copy. After the one or more data volumes have been restored in reverse chronological order, a roll-forward memory can be used to incrementally restore the one or more data volumes in forward chronological order to the data state they occupied at some other point in time without using a backup copy. Incrementally restoring the one or more data volumes in reverse chronological order may follow an incremental restoration of the one or more data volumes in forward chronological order and vice versa until the one or more data volumes are in the data state they occupied just prior to, for example, a data corruption event.

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Tanenbaum, Andrew, “Structured Computer Organization,” Prentice Hall, 1984, pp. 10-12.

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