International Business Machines Corporation

Joshua Douglas Martin

Vernon Walter Miller

Yan Xu

Bruce McNutt

Olga Yiparaki

Eduardo Campos Peiro

Justin Thomson Miller

James Russell Thompson

Lee Charles LaFrese

Lee Charles La Frese

A computer-implemented method according to one embodiment includes identifying aggregated customer performance data for a system resource, creating a first system map for the system resource, utilizing the aggregated customer performance data, comparing the first system map to a second system map created for the system resource utilizing calibration data, and adjusting the second system map, based on the comparing.

Storage system performance models based on empirical component utilization

A mechanism for selectively disabling and enabling read caching based on past performance of the cache and current read/write requests. The system improves overall performance by using an autonomic algorithm to disable read caching for regions of backend disk storage (i.e., the backstore) that have had historically low cache hit ratios. The result is that more cache becomes available for workloads with larger hit ratios, and less time and machine cycles are spent searching the cache for data that is unlikely to be there.

Method for selectively enabling and disabling read caching in a storage subsystem

An apparatus, system and method to optimize load distribution across logical and physical resources in a storage system. An apparatus in accordance with the invention may include an availability module and an allocation module. The availability module may dynamically assign values to resources in a hierarchical tree structure. Each value may correspond to an availability parameter such as allocated volumes, current resource utilization, and historic resource utilization. The allocation module may serially process the values and allocate a load to a least busy resource in the hierarchical tree structure based on the assigned values.

System and method for identifying least busy resources in a storage system using values assigned in a hierarchical tree structure

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Tucson, AZ, United States of America

Joshua Douglas Martin