Systems and methods for using thin provisioning to reclaim space identified by data reduction processes
US8332612B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2012 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Mar 5, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0665
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a system to reclaim space identified as no longer in use and comprises a vLUN, a thinly provisioned mapped LUN, a mapping layer, and a data reduction engine. Chunks of data are stored at logical chunk addresses (LCAs) in the vLUN and are mapped to corresponding physical chunk addresses (PCAs) in the thinly provisioned mapped LUN. The data reduction engine performs a data reduction process on a first logical chunk of data stored at a first LCA in the vLUN, where the first logical chunk has a size that is a nonzero integer multiple of the size of the storage extent of the thinly provisioned mapped LUN. After the data reduction process, the PCA associated with the first logical chunk is no longer needed, and the thinly provisioned mapped LUN is instructed to deallocate the PCA associated with the first logical chunk that is no longer needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.