Shared-disk architecture: Difference between revisions

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{{refimprove|date=November 2012}}A '''shared disk architecture''' (SD) is a distributed computing architecture in which the nodes share same disk devices but each node has its own private memory.<ref>{{Cite web|date=2020-05-18|title=Difference between Shared Nothing Architecture and Shared Disk Architecture|url=https://www.geeksforgeeks.org/difference-between-shared-nothing-architecture-and-shared-disk-architecture/|access-date=2021-02-24|website=GeeksforGeeks|language=en-US}}</ref>. The disks have active nodes which all share memory in case of any failures.<ref>{{Cite journal|title=Solar: Towards a Shared-Everything Database on Distributed

Log-Structured Storage|url=https://www.cs.utah.edu/~dongx/paper/solar-atc.pdf|journal=https://www.cs.utah.edu/~dongx/paper/solar-atc.pdf|pages=13|via=Solar}}</ref> In this architecture the disks are accessible from all the cluster nodes. This architecture has quick adaptability to the changing workloads.<ref>{{Cite web|last=Rylan|first=John|date=1 April 2018|title=Big Database (Part 2): Database Architecture|url=https://dzone.com/articles/big-database-2-database-architecture|url-status=live|website=DZone}}</ref> It uses robust optimization techniques. It contrasts with [[shared nothing architecture]], in which all nodes have sole access to distinct disks.<ref name="stopford">{{cite web|date=November 24, 2009|title=Shared Nothing v.s. Shared Disk Architectures: An Independent View|url=http://www.benstopford.com/2009/11/24/understanding-the-shared-nothing-architecture/|accessdate=November 1, 2012}}</ref> Multiple processors can access all disks directly via intercommunication network and every processor has local memory.