Remote data mirroring with acknowledgment upon writing...

Details Remote data mirroring with acknowledgment upon writing... Remote data mirroring with acknowledgment upon writing...

2007-09-04

2007-09-04

Peikari, B. James (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S161000, C711S006000, C711S005000

Reexamination Certificate

active

10673744

ABSTRACT:
A method for storing data received from a host processor at a primary storage subsystem in a data storage system includes writing the data to a first volatile cache memory in the primary storage subsystem and copying the data from the primary storage subsystem to a secondary storage subsystem. The second subsystem writes the copied data to a second volatile cache memory and returns an acknowledgment to the primary storage subsystem responsively to writing the copied data to the second volatile cache memory and prior to saving the data in the second non-volatile storage media. The primary storage subsystem signals the host processor that the data have been stored in the data storage system responsively to the acknowledgment from the secondary storage subsystem.

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Ji, Minwen et al., “Seneca: Remote Mirroring Done Write,” Proceedings of USENIX Technical Conference, San Antonio, TX, pp. 253-268, Jun. 2003. USENIX, Berkeley, CA.

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