Systems and methods for load balancing storage system...

Details Systems and methods for load balancing storage system... Systems and methods for load balancing storage system...

2008-05-19

2010-11-23

Ngo, Ricky (Department: 2464)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

C370S248000, C710S316000, C709S223000

Reexamination Certificate

active

07839788

ABSTRACT:
Methods and systems for distributing I/O requests from a computer system to a storage system over multiple paths having non-homogeneous transfer speeds. A large I/O request is partitioned into a plurality of smaller I/O operations between a computer system and a storage system. The I/O operations are distributed over a plurality of communication paths coupling the computer system and the storage system. The distribution attempts to balance the load over the multiple paths based on the transfer speed of each path. In one embodiment, operations are distributed only to the highest speed paths presently operable. In another embodiment, an estimated completion time for an operation is determined for each path and a path with the lowest estimated completion time is selected to transfer the next operation.

REFERENCES:
patent: 2004/0042489 (2004-03-01), Messick et al.
patent: 2006/0085595 (2006-04-01), Slater
patent: 2007/0067537 (2007-03-01), Seto
patent: 2007/0130344 (2007-06-01), Pepper
patent: 2008/0222661 (2008-09-01), Belyakov et al.
patent: 2008/0250178 (2008-10-01), Haustein et al.
patent: 2009/0190493 (2009-07-01), Nakata

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