In distributed computing, a single system image (SSI) cluster is a cluster of machines that appears to be one single system.[1][2][3] The concept is often considered synonymous with that of a distributed operating system,[4][5] but a single image may be presented for more limited purposes, just job scheduling for instance, which may be achieved by means of an additional layer of software over conventional operating system images running on each node.[6] The interest in SSI clusters is based on the perception that they may be simpler to use and administer than more specialized clusters.
Different SSI systems may provide a more or less complete illusion of a single system.
^Pfister, Gregory F. (1998), In search of clusters, Upper Saddle River, NJ: Prentice Hall PTR, ISBN 978-0-13-899709-0, OCLC 38300954
^Buyya, Rajkumar; Cortes, Toni; Jin, Hai (2001), "Single System Image" (PDF), International Journal of High Performance Computing Applications, 15 (2): 124, doi:10.1177/109434200101500205, S2CID 38921084
^Healy, Philip; Lynn, Theo; Barrett, Enda; Morrison, John P. (2016), "Single system image: A survey" (PDF), Journal of Parallel and Distributed Computing, 90–91: 35–51, doi:10.1016/j.jpdc.2016.01.004, hdl:10468/4932
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Coulouris, George F; Dollimore, Jean; Kindberg, Tim (2005), Distributed systems: concepts and design, Addison Wesley, p. 223, ISBN 978-0-321-26354-4
^Bolosky, William J.; Draves, Richard P.; Fitzgerald, Robert P.; Fraser, Christopher W.; Jones, Michael B.; Knoblock, Todd B.; Rashid, Rick (1997-05-05), "Operating System Directions for the Next Millennium", 6th Workshop on Hot Topics in Operating Systems (HotOS-VI), Cape Cod, MA, pp. 106–110, CiteSeerX 10.1.1.50.9538, doi:10.1109/HOTOS.1997.595191, ISBN 978-0-8186-7834-9, S2CID 15380352{{citation}}: CS1 maint: location missing publisher (link)
^Prabhu, C.S.R. (2009), Grid And Cluster Computing, Phi Learning, p. 256, ISBN 978-81-203-3428-1
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