Method and apparatus for managing the placement of data in a storage system to achieve increased system performance
US6314503A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1998 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Dec 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/084
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for managing data storage in a computer system including a host computer and a storage system that stores data accessed by the host computer. A performance condition that impacts system performance is detected, and in response thereto, the data within the storage system is reconfigured to improve system performance. In one aspect, this detection and reconfiguration is done automatically within the storage system in a manner transparent to the host computer. Examples of performance conditions that can be detected and alleviated include logical volumes including hot spots that are larger than the cache storage dedicated to the volumes, data segments that are accessed frequently by the host but not sufficiently frequently so that they remain in the cache between accesses, and large data segments that are accessed frequently and sequentially by the host and are stored on the same physical device within the storage system. Another aspect is directed to a computer system including multiple storage systems, and wherein a performance condition that can be detected and alleviated relates to the distribution of the system data between the multiple storage systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.