Coherency of non-committed replicate data after...

Details Coherency of non-committed replicate data after... Coherency of non-committed replicate data after...

2006-05-30

2006-05-30

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S005110, C714S013000, C711S162000

Reexamination Certificate

active

07055057

ABSTRACT:
When notice of a failover is received from a second information processing device during execution of remote copying, a second storage device requests from a first storage device first information indicating that a replication of the data written in a first storage area has not yet been transmitted to the second storage device, and that the replication of the data has not been written to a second storage area. When the first information is received from the first storage device as per the request, the second information processing device is notified that a data input/output request can be received; and, when a data read request transmitted from the second information processing device that performed failover is received, it is determined, by referring the first information, whether the target data of the data read request is stored in the first storage area.

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