Method and system for managing a raid storage system with cache
US6341331B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1999 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Oct 1, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0848
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer system has a host computer that runs applications that require data objects from a storage system. The storage system has a storage device, such as a disk storage device, and a cache memory. Data objects that are frequently used by the host computer are stored in the cache memory. The data objects are also stored in the storage device logically arranged in segments of data objects, and groups of segments. The cache memory is logically partitioned into a segment cache and a group cache. Data of a small granular nature namely segments, are stored in the segment cache. Data of a larger granular nature, namely groups, is stored in the group cache. When the host computer requests accesses to read or write data objects, groups of segments are staged or destaged between the storage device and the group cache, with at least one segment of each staged group containing one of the requested data objects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.