Management of write cache using stride objects
US8549220B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2012 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Sep 14, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0866
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method, system, and computer program product embodiments for, in a computing storage environment for destaging data from nonvolatile storage (NVS) to a storage unit, identifying working data on a stride basis by a processor device are provided. A multi-update bit is established for each of a plurality of strides in a modified cache, wherein the multi-update bit is adapted to indicate a corresponding stride is part of at least one track in a working set that refers to a group of frequently updated tracks. The plurality of strides are scanned based on a schedule to identify tracks for destaging. An operation to destage is performed on a selected track identified during the scanning, if the multi-update bit of a selected stride on the selected track is set to indicate the selected track is part of the working set and if the NVS is about 90% full or greater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.