Distributed cache coherency protocol for reduced latency across WAN links

Distributed cache coherency protocol for reduced latency across WAN links

A share group for a distributed volume is separated into two non-overlapping, cluster-local SGCs (share group cliques). Each SGC has an independent local meta-directory master hosted by a computing node of the SGC cluster. Each SGC maintains an independent local directory for the distributed volume....

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Bromling, Steven, Lake, Brian, Baergen, Joshua
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:A share group for a distributed volume is separated into two non-overlapping, cluster-local SGCs (share group cliques). Each SGC has an independent local meta-directory master hosted by a computing node of the SGC cluster. Each SGC maintains an independent local directory for the distributed volume. The directory may be spread across multiple computing nodes of the SGC cluster. Changes to the distributed volume (writes) are coordinated across the pair of SGCs to provide data consistency. The coordination of these changes is conducted using relatively few inter-SGC round-trips. Read access to the distributed volume is safely conducted without inter-SGC coordination.