Checkpoint and consistency markers

Details Checkpoint and consistency markers Checkpoint and consistency markers

2007-02-13

2007-02-13

Nguyen, Hiep T. (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

Reexamination Certificate

active

11072612

ABSTRACT:
Described are a method, computer program product, and system for obtaining a copy of source data in a consistent state. One or more file operations having a corresponding time sequence which modify said source data are recorded. A request for a copy of the source data in a consistent state is received. It is determined at which point in the corresponding time sequence said source data is in a consistent state as a result of applying a portion of the file operations. The point in the corresponding time sequence at which the source data is in a consistent state is marked. The portion of file operations determined to place the source data in a consistent state is applied to the copy of the source data.

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U.S. Appl. No. 11/072,141.
U.S. Appl. No. 11/072,128.

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