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<What is Clustering? ⁄ >




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A computer cluster is a group of linked computers, working together closely so that in many respects they form 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 of a single computer, while typically being much more cost-effective than single computers of comparable speed or availability.
In simple words, a cluster is a group of servers and other resources that act like a single system and enable high availability, high scalability, load balancing and parallel processing.
Clustering can be implemented at different levels of the system, including hardware, operating systems, middleware, systems management and applications. The more layers that incorporate clustering technology to more complex the whole system is to manage.



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