The Essentials ofComputer(computer) 441

The Essentials ofComputer(computer) 441 - A network of...

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A network of workstations ( NOW ) is a collection of distributed workstations that works in parallel only while the nodes are not being used as regular worksta- tions. NOWs typically consist of heterogeneous systems, with different proces- sors and software, that communicate via the Internet. Individual users must establish the appropriate connection to the network before joining the parallel computation. A cluster of workstations ( COW ) is a collection similar to a NOW, but it requires that a single entity be in charge. Nodes typically have common software, and a user that can access one node can usually access all nodes. A ded- icated cluster parallel computer ( DCPC ) is a collection of workstations specifi- cally collected to work on a given parallel computation. The workstations have common software and file systems, are managed by a single entity, communicate via the Internet, and aren’t used as workstations. A pile of PCs ( POPC ) is a clus- ter of dedicated heterogeneous hardware used to build a parallel system. Whereas
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