Methods and structure for supporting persistent reservations in a multiple-path storage environment
US7313636B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2004 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Jan 24, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/387
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A persistent reservation emulation structure to emulate exclusive reservation SCSI-3 protocol features in a host system having multiple paths to a storage device. An enhanced multiple-path driver layer (or other processing elements) provide emulation of persistent reservation commands directed from a host system to a storage device. The driver does not forward exclusive type reservations to the storage device but rather emulates the desired exclusive operations on the systems behalf using only non-exclusive reservation types. The emulated reservation handling enables parallel use of multiple paths between a host system and a storage device to improve reliability and/or performance of the storage device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.