Method and apparatus for detecting and preemptively ameliorating potential logic unit thrashing in a storage system having multiple requesters
US8645635B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2003 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Apr 25, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0601
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for detecting and preemptively ameliorating potential logic unit thrashing in a storage system having multiple I/O requesters is disclosed. In response to detecting that each of two requesters has usable access to both of the active-passive pair of controllers, one of the active-passive pair of controllers is selected to be designated as an active resource controller. In response to detecting that one of the two requesters has usable access to only one of the active-passive pair of controllers, only one of the active-passive pair of controllers is selected to be designated as an active resource controller. In response to detecting that each of the two requesters has usable access only to different ones of the active-passive pair of controllers, one of the active-passive pair of controllers is selected to be designated as an active resource controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.