Storage system, load distribution management method, and...

Details Storage system, load distribution management method, and... Storage system, load distribution management method, and...

2009-01-29

2011-12-27

Elmore, Stephen (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S156000, C711S203000, C711S205000, C711S221000

Reexamination Certificate

active

08086796

ABSTRACT:
A host computer includes a virtual disk control part for controlling an input/output request into a virtual disk. A plurality of storage subsystems includes a load monitoring part for measuring a load on a physical disk by the input/output request and storing load information in a disk management table. The virtual disk control part identifies, upon receiving the input/output request into a not-ever-outputted space in a virtual disk, an appropriate logical disk on the virtual disk based on the load information in the disk management table, sends the input/output request to the storage subsystem having the identified logical disk, and updates, upon receiving a completion acknowledgement of the input/output request, the load information in the disk management table based on the load information in the logical disk map information table.

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patent: 2009/0077311 (2009-03-01), Amano et al.
patent: 2006-318012 (2006-11-01), None

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