Shared-disk architecture: Difference between revisions

Revision as of 09:51, 21 February 2016

Revision as of 17:53, 5 June 2016

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{{refimprove|date=November 2012}}

A '''shared disk architecture''' (SD) is a [[distributed computing]] architecture in which all disks are accessible from all cluster nodes.<ref name=stopford>{{cite web | url=http://www.benstopford.com/2009/11/24/understanding-the-shared-nothing-architecture/ | title=Shared Nothing v.s. Shared Disk Architectures: An Independent View | date=November 24, 2009 | accessdate=November 1, 2012}}</ref> It contrasts with [[shared nothing architecture]], in which all nodes have sole access to distinct disks.<ref name=stopford/> Multiple processors can access all diskdisks directly via intercommunication network. Butand every processor has local memory.

Shared Disk has two advantages over Shared memory. Firstly, Eacheach processor has its own memory,the memory bus is not a bottleneck.Secondly; secondly, Systemthe system offers a simple way to provide a degree of fault tolerencetolerance.

[[File:Shared Disk Architecture.jpg|thumb|Shared Disk Architecture]]