Strategies for reading information from a mass storage medium using a cache memory
US7337273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2004 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Oct 29, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0862
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Cache management strategies are described for retrieving information from a storage medium, such as an optical disc, using a cache memory including multiple cache segments. A first group of cache segments can be devoted to handling the streaming transfer of a first type of information, and a second group of cache segments can be devoted to handling the bulk transfer of a second type of information. A host system can provide hinting information that identifies which group of cache segments that a particular read request targets. A circular wrap-around fill strategy can be used to iteratively supply new information to the cache segments upon cache hits by performing pre-fetching. Various eviction algorithms can be used to select a cache segment for flushing and refilling upon a cache miss, such as a least recently used (LRU) algorithm or a least frequently used (LFU) algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.