Shared disk architecture

A shared disk architecture (SD) is a distributed computing architecture in which all disks are accessible from all cluster nodes.^[1] It contrasts with shared nothing architecture, in which all nodes have sole access to distinct disks.^[1]Multiple processors can access all disk directly via intercommunication network. But every processor has local memory.

Shared Disk has two advantages over Shared memory.Firstly, Each processor has its own memory,the memory bus is not a bottleneck.Secondly, System offers a simple way to provide a degree of fault tolerence.

Shared Disk Architecture

References

1. "Shared Nothing v.s. Shared Disk Architectures: An Independent View". November 24, 2009. Retrieved November 1, 2012.