Method and system of an adaptive input/output scheduler for...

Details Method and system of an adaptive input/output scheduler for... Method and system of an adaptive input/output scheduler for...

2009-06-10

2011-12-13

Elmore, Stephen (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S156000, C711S158000, C710S007000, C710S015000, C702S182000

Reexamination Certificate

active

08078799

ABSTRACT:
An adaptive input/output (I/O) scheduler for storage arrays is disclosed. In one embodiment, a method of a redundant array of independent disks (RAID) controller for deploying an optimal I/O scheduler type per a storage array configuration includes generating performance data by assessing respective performances of a plurality of I/O scheduler types on different RAID level test volumes with at least one I/O pattern generated internally within a storage subsystem which comprises the RAID controller. The method also includes storing the associativeness of the performance data with respect to a particular I/O scheduler most suited for a given I/O workload to a nonvolatile memory of the RAID controller. The method further includes deploying an optimal one of the plurality of I/O scheduler types and at least one performance parameter for at least one subsequent I/O operation associated with the storage subsystem based on the performance data.

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