Method and system for ensuring data consistency after a...

Details Method and system for ensuring data consistency after a... Method and system for ensuring data consistency after a...

2007-02-13

2007-02-13

Beausoliel, Robert W. (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C718S101000, C711S162000

Reexamination Certificate

active

10456041

ABSTRACT:
Methods and apparatus for obtaining consistency of redundant data after a failover event. In one aspect, a redundant data storage system has a first data storage facility that initially acts as a primary facility for storage requests and a second data storage facility that initially acts as a secondary facility for the storage requests. The second data storage facility is conditioned to assume the role of the primary facility in response to a failover event. The first data storage facility is conditioned to assume the role of the secondary facility, which includes sending a copy of data committed at the second data storage facility to the first data storage facility. The copy of data includes a version of data committed at the second storage facility.

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