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Published byClifford Chase Modified over 9 years ago
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By Ronnie Julio Mohammad Alsawwaf
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Using more than two computer systems that are linked together Handles a larger/more variable workload Provides continued operation when/if one system fails A main idea of clustering is that the cluster can appear to be a single system capable of a maximum workload
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Cluster computing can be used as a relatively low-cost form of parallel processing for scientific and other applications that lend themselves to parallel operations. An early and well-known example was the Beowulf project in which a number of off-the-shelf PCs were used to form a cluster for scientific applications.
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Because each computer system could be a multiprocessor, linking just two together could result in an output of eight computers processing at once. Uses of clustering include high availability and load balancing
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Distributes the workload across the cluster Increases reliability through redundancy Mediates communication within the cluster The main reason clustering is used is for load balancing
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Load balancing allows for: optimal resource usage maximum throughput minimal response time lowered change of overloading Provides fault tolerance when one server fails, one or more servers are available Used to control traffic on high-traffic websites traffic is handled more quickly
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The load balancing service is usually provided by a dedicated program or hardware device (such as a multilayer switch or a DNS server).
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PC Magazine (pcmag.com) http://www.pcmag.com/encyclopedia_term/0,2542,t=server+clustering&i=39855,00.asp http://www.pcmag.com/encyclopedia_term/0,2542,t=server+clustering&i=39855,00.asp What Is It (whatitis.com) Wikipedia
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