Method and apparatus for improving storage device performance by selective volume swapping based on hot spot analysis
US7363453B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2004 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | Oct 19, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99932
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optimizer process in a storage system automatically selects access activity data for storage devices in the system during periods of interest so that a volume-swapping optimization analysis is based on desired device performance information and thus yields improved optimization results. For each of a number of sampling intervals in an analysis period, workload statistics are collected for logical volumes in the system. From the workload statistics, a service time is calculated for each storage device for each sampling interval. A set of highest service times is identified from the service times for each device, such as those above the 80th percentile, and a service time measure is generated from the set of highest service times. Devices having the highest and lowest measures are identified, and a pair of volumes is identified that, if swapped between the two devices, would improve the service time measure of the higher-service-time device without unduly degrading the service time measure of the lower-service-time device. Such volumes are subsequently swapped, improving the performance of the higher-service-time device and the overall system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.