Cache system with file surge protection and method for managing allocation of storage in the cache
US5544343A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1993 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Dec 23, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0866
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An outboard file cache system including file surge protection and an improved method for managing allocation of cache storage are disclosed. In an outboard cache, excessive writes to a file are detected by testing whether a segment belonging to a file specified by a nd, which logically precedes one of the segments specified in the command by a predetermined number of segments, is present in the outboard file cache, has been written, and has not been destaged. When a first surge-threshold is reached, a group of segments is selected and destaged. When a second surge-threshold is reached, the outboard cache inhibits allocation of further cache storage for the file for the purpose of writing until a selected group of segments is destaged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.