top500.org
beowulf.org
clusterknoppix
bccd.cs.uni.edu
ParallelKnoppix
openmosix
OpenSSI
chaos
A computer cluster is a group of loosely coupled computers that work together closely so that in many respects they can be viewed as though they are a single computer. The components of a cluster are commonly, but not always, connected to each other through fast local area networks. Clusters are usually deployed to improve performance and/or availability over that provided by a single computer, while typically being much more cost-effective than single computers of comparable speed or availability.
The TOP500 organization's semiannual list of the 500 fastest computers usually includes many clusters. TOP500 is a collaboration between the University of Mannheim, the University of Tennessee, and the National Energy Research Scientific Computing Center at Lawrence Berkeley National Laboratory. As of June 2007, the top supercomputer is the Department of Energy's IBM BlueGene/L system with performance of 280.6 TFlops.
Top500:
373 Clusters (74,60 %)
107 MPPs (21,40%)
20 Constellations (4,00%)
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