Discipline for lock reassertion in a distributed file system
US7124131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2003 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | May 12, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99952
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for asserting a lock in a distributed file system is provided. All distributed locks have a lease for a limited time period, wherein the lease may be renewed periodically. A lock manager data structure is provided to maintain mode compatibility of locks granted to different client nodes for the same object. The process of acquiring or reasserting a lock includes determining whether there are other valid locks in use, as well as whether a valid lock is in operation in a conflicting or compatible mode with a requested lock. A new lock lease may be granted and a lock lease which has expired may be reasserted if a conflicting lease is not present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.