Computer clusters

A computer cluster is a network of connected computers (nodes). While resources and tasks are shared within the network of computers, the user is provided with just a single point of access. The great thing about a computer cluster is that it enables horizontal scaling (scaling out). This refers to increasing the computational power of a cluster by adding more nodes to it. This is in contrast to scaling up, where the computational power is increased by buying a more powerful computer. 

Computer clusters make use of the principle of scaling out (horizontal scaling). This bypasses computational power limits that exist with single-node computers, because the size of a computer cluster can be increased deliberately just by adding additional nodes. Due to their scalability, computer clusters have enabled the storage, processing and analysis of big data. If it weren’t for computer clusters, our computational power would largely be bound to what single-node servers could provide – which is a joke when you consider the requirements created by the masses of data out there. 

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