Techniques for managing placement of extents based on a history of active extents
US8782324B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2012 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Nov 7, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0688
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique of managing data placement involves constructing an active extent list which identifies active extents stored in a storage pool based on a history of extent activity. The technique further involves based on the active extent list, generating preferred extent-tier pairings for extents of a particular LUN slice that are initially stored on a first tier of the pool, the preferred extent-tier pairings matching (i) a first extent of that LUN slice to the first tier and (ii) a second extent of that LUN slice to a second tier of the pool. The technique further involves, based on the preferred extent-tier pairings, maintaining the first extent on the first tier and relocating the second extent from the first tier to the second tier to distribute the first and second extents of that LUN slice across multiple tiers of the pool in accordance with the extent activity history.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.