Augmented advisory lock mechanism for tightly-coupled clusters
US8645650B2 · kind B2 · utility
5Cited by
2References
16Claims
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Key dates
| Filing date | Jan 29, 2010 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Feb 26, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An inter-machine locking mechanism coordinates the access of shared resources in a tightly-coupled cluster that includes a number of processing systems. When a requesting processing system acquires a lock to access a resource, a comparison is made between values of a global counter and a local counter. The global counter indicates the number of times the lock is acquired exclusively by any of the processing systems. Based on the comparison result, the requesting processing system determines whether the resource has been modified since the last time it held the lock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.