Reducing data loss and unavailability by integrating...

Details Reducing data loss and unavailability by integrating... Reducing data loss and unavailability by integrating...

2008-08-06

2011-11-08

Cottingham, John R. (Department: 2167)

Data processing: database and file management or data structures

File or database maintenance

Database recovery

C707S690000, C707S691000

Reexamination Certificate

active

08055631

ABSTRACT:
A method for reducing data loss and unavailability by integrating multiple levels of a storage hierarchy is provided. The method includes receiving a read request. In addition, the method includes recognizing a data failure in response to the read request. The method further includes locating an alternate source of the data to be read in response to recognizing the data failure. The alternate source includes data cached at devices in the storage hierarchy, data in a backup system, and cumulative changes to the data since the last backup. Moreover, the method includes responding to the read request with data from the alternate source.

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