Method for data retention in a data cache and data storage system
US7080208B2 · kind B2 · utility
11Cited by
7References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2003 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | Sep 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0866
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for data retention in a data cache and a data storage system are provided. The data storage system (100) includes a storage controller (102) with a cache (103) and a data storage means (106). The cache (103) has a first least recently used list (104) for referencing dirty data which is stored in the cache (103), and a second least recently used list (105) for clean data in the cache (103). Dirty data is destaged from the cache (103) when it reaches the tail of the first least recently used list (104) and clean data is purged from the cache (103) when it reaches the tail of the second least recently used list (105).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.