Consistent unmapping of application data in presence of concurrent, unquiesced writers and readers
US9146766B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2011 |
| Grant date | Sep 29, 2015 |
| Priority date | — |
| Expiry date | Oct 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/154
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Free storage blocks previously allocated to a logical block device are released back to an underlying storage system supporting the logical block device in a manner that does not conflict with write operations that may be issued to the free storage blocks at about the same time. According to a first technique, write operations on the same storage blocks to be released are paused until the underlying storage system has completed the releasing operation or, if the write operations are issued earlier than when the underlying storage system actually performs the releasing operation, such storage blocks are not released. According to a second technique, a special file is allocated the free storage blocks, which are then made available for safe releasing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.