Data processing system having a plurality of storage systems

Details Data processing system having a plurality of storage systems Data processing system having a plurality of storage systems

2007-05-08

2007-05-08

Bataille, Pierre (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C707S793000, C707S793000, C709S217000, C714S006130

Reexamination Certificate

active

10765128

ABSTRACT:
It is an object of the present invention to conduct data transfer or data copying between a plurality of storage systems, without affecting the host computer of the storage systems. Two or more auxiliary storage systems100B,100C are connected to a primary storage system100A connected to a host device180. The auxiliary storage systems100B,100C read journals of data update from the primary storage system100A at respective independent timings, save the journals in prescribed logical volumes JNL2, JNL3, produce copying of the data present in the primary storage system100A based on the journals present in the logical volumes JNL2, JNL3at the independent timings, and save the copies in auxiliary logical volumes COPY1, COPY3. The primary storage system100A holds the journals till both auxiliary storage systems100B,100C read the journals and restore. The timing of journal read can be controlled according to the journal quantity, processing load, and the like.

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