Scheduling of reconstructive I/O read operations in a storage environment
US8862820B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2013 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Nov 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0804
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for effectively scheduling read and write operations among a plurality of solid-state storage devices. A computer system comprises client computers and data storage arrays coupled to one another via a network. A data storage array utilizes solid-state drives and Flash memory cells for data storage. A storage controller within a data storage array comprises an I/O scheduler. The storage controller is configured to receive a read request targeted to the data storage medium, and identify at least a first storage device of the plurality of storage devices which contains data targeted by the read request. In response to either detecting or predicting the first storage device will exhibit variable performance, the controller is configured to generate a reconstruct read request configured to obtain the data from one or more devices of the plurality of storage devices other than the first storage device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.