Method and system for service-aware parity placement in a storage system
US9367396B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2014 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Dec 19, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/403
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for service-aware parity placement in a storage system, including after receiving the service notification specifying a target SD: writing a RAID stripe to the persistent storage, where the parity block of the RAID stripe is stored on the target SD and none of the data blocks in the RAID stripe are stored on the target SD. The method further includes performing a modified garbage collection operation that includes identifying a live RAID stripe in the persistent storage, writing a new RAID stripe to a new location in the persistent storage, where the new RAID stripe includes a copy of at least a portion of data from the live RAID stripe and a parity block in the new RAID stripe is stored on the target SD, and issuing a removal notification when the modified garbage collection operation is completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.