System and apparatus for merging a write event journal and an or

Details System and apparatus for merging a write event journal and an or System and apparatus for merging a write event journal and an or

1997-11-14

2000-12-05

Iqbal, Nadeem

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

714 20, G06F 1100

Patent

active

061580198

ABSTRACT:
A method and apparatus for restoring an updated computer storage from a journal of write events and a copy of an original storage generates an event map from the journal of write events. The event map permits efficient combination of the contents of the write event journal and the original storage. The event map also enables translation of the event journal into a delta expressing the differences between the original and updated storages. The event map similarly permits efficient merging of a write event journal and an original file stored streaming tape.

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