Storage control apparatus and method for compressing data for disk storage
US6816942B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1995 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Dec 15, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/401
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of managing compressed data in a disk storage device, including forming compressed segment areas in a continuous area according to a determined occupation ratio of the continuous area; obtaining a compression block corresponding to data to be stored in the disk storage device; deciding a compressed segment area to which the obtained compression block is to be stored according to a size of the obtained compression block; expanding the occupation ratio when an empty area in any of the compressed segment areas becomes less than a predetermined threshold value; and changing the occupation ratio of each compressed segment area of the continuous area according to the maintained record conditions of the compression blocks, dynamically, and based on an actual occupation ratio of compression blocks stored in each compressed segment area when an empty area in any of the compressed segment areas becomes less than a predetermined threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.