DZone

What is a Cluster?
In a computer system, a cluster is a group of servers (nodes) that act like a single system and enable high availability and, in some cases, load balancing and parallel processing.
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Source: DZone
Aggregating the Future
DZone

In a computer system, a cluster is a group of servers (nodes) that act like a single system and enable high availability and, in some cases, load balancing and parallel processing.
Click here for more details.
Source: DZone