Method and apparatus for decomposing I/O tasks in a raid system
US7539991B2 · kind B2 · utility
17Cited by
72References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2002 |
| Grant date | May 26, 2009 |
| Priority date | — |
| Expiry date | Nov 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2087
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention implements an I/O task architecture in which an I/O task requested by the storage manager, for example a stripe write, is decomposed into a number of lower-level asynchronous I/O tasks that can be scheduled independently. Resources needed by these lower-level I/O tasks are dynamically assigned, on an as-needed basis, to balance the load and use resources efficiently, achieving higher scalability. A hierarchical order is assigned to the I/O tasks to ensure that there is a forward progression of the higher-level I/O task and to ensure that resources do not become deadlocked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.