Storage system, storage subsystem and storage control method
US7984245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2008 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Jan 14, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0866
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Proposed is a storage system capable of preventing the compression of a cache memory caused by data remaining in a cache memory of a storage subsystem without being transferred to a storage area of an external storage, and maintaining favorable I/O processing performance of the storage subsystem. In this storage system where an external storage is connected to the storage subsystem and the storage subsystem provides a storage area of the external storage as its own storage area, provided is a volume for saving dirty data remaining in a cache memory of the storage subsystem without being transferred to the external volume. The storage system recognizes the compression of the cache memory, and eliminates the overload of the cache memory by saving dirty data in a save volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.