Editing Parallel computing (section)

=====Massively parallel computing=====
{{main|Massively parallel (computing)}}

[[File:BlueGeneL cabinet.jpg|right|thumbnail|upright|A cabinet from [[IBM]]'s [[Blue Gene|Blue Gene/L]] massively parallel [[supercomputer]]]]

A massively parallel processor (MPP) is a single computer with many networked processors. MPPs have many of the same characteristics as clusters, but MPPs have specialized interconnect networks (whereas clusters use commodity hardware for networking). MPPs also tend to be larger than clusters, typically having "far more" than 100&nbsp;processors.<ref>Hennessy and Patterson, p.&nbsp;537.</ref> In an MPP, "each CPU contains its own memory and copy of the operating system and application. Each subsystem communicates with the others via a high-speed interconnect."<ref>[https://www.pcmag.com/encyclopedia_term/0,,t=mpp&i=47310,00.asp MPP Definition.] {{Webarchive|url=https://web.archive.org/web/20130511084523/https://www.pcmag.com/encyclopedia_term/0%2C%2Ct%3Dmpp%26i%3D47310%2C00.asp |date=2013-05-11 }} ''PC Magazine''. Retrieved on November 7, 2007.</ref>

[[IBM]]'s [[Blue Gene|Blue Gene/L]], the fifth fastest [[supercomputer]] in the world according to the June 2009 [[TOP500]] ranking, is an MPP.