Overwriting part of compressed data without decompressing on-disk compressed data
US8745338B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2011 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Apr 25, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/401
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Overwriting part of compressed data without decompressing on-disk compressed data is implemented by receiving a write request for a block of data in a compression group from a client, wherein the compression group comprises a group of data blocks that is compressed, wherein the block of data is uncompressed. The storage server partially overwrites the compression group, wherein the compression group remains compressed while the partial overwriting is performed. The storage server determines whether the partially overwritten compression group including the uncompressed block of data should be compressed. The storage server defers compression of the partially overwritten compression group if the partially overwritten compression group should not be compressed. The storage server compresses the partially overwritten compression group if the partially overwritten compression group should be compressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.