Planned switchover in connection with triangular...

Details Planned switchover in connection with triangular... Planned switchover in connection with triangular...

2006-03-31

2008-09-30

Bragdon, Reginald G. (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711SE12103, C714S006130

Reexamination Certificate

active

07430646

ABSTRACT:
A primary group may be swapped with a synchronous backup group where triangular asynchronous replication is being provided between the primary group, the synchronous backup group and an asynchronous backup group. Swapping may include halting work at the primary group, transferring pending mirrored data from the primary group to an asynchronous backup group, creating a data mirroring relationship between a storage volume at the synchronous backup group and a storage volume at the asynchronous backup group, reversing a data mirroring relationship between the storage volume at the primary group and the storage volume at the synchronous backup group, and resuming work at the asynchronous backup group.

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