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A computer cluster may be a simple two-node system which just connects two personal computers, or may be a very fast [[supercomputer]]. A basic approach to building a cluster is that of a [[Beowulf (computing)|Beowulf]] cluster which may be built with a few personal computers to produce a cost-effective alternative to traditional [[high-performance computing]]. An early project that showed the viability of the concept was the 133-node [[Stone Soupercomputer]].<ref name="sciam">{{Cite news |title= The Do-It-Yourself Supercomputer |work= [[Scientific American]] |author= William W. Hargrove, Forrest M. Hoffman and [[Thomas Sterling (computing)|Thomas Sterling]] |volume= 265 |number= 2 |pages= 72–79 |date= August 16, 2001 |url= http://www.sciam.com/article.cfm?id=the-do-it-yourself-superc |access-date= October 18, 2011 }}</ref> The developers used [[Linux]], the [[Parallel Virtual Machine]] toolkit and the [[Message Passing Interface]] library to achieve high performance at a relatively low cost.<ref name="extreme">{{Cite news |title= Cluster Computing: Linux Taken to the Extreme |first1= William W. |last1= Hargrove |first2= Forrest M. |last2= Hoffman |work= Linux Magazine |year= 1999 |url= http://climate.ornl.gov/~forrest/linux-magazine-1999/ |access-date= October 18, 2011 |archive-url= https://web.archive.org/web/20111018122713/http://climate.ornl.gov/~forrest/linux-magazine-1999/ |archive-date= October 18, 2011 |url-status= dead }}</ref>
Although a cluster may consist of just a few personal computers connected by a simple network, the cluster architecture may also be used to achieve very high levels of performance. The [[TOP500]] organization's semiannual list of the 500 fastest
==History==
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