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Word of the day....
horizontal scalability
Horizontal scalability is an approach to increasing capacity that relies on connecting multiple hardware or software entities so they work as a single logical unit. Horizontal scalability can be contrasted with vertical scalability, which increases capacity by adding more resources (such as memory) to the same machine. Vertical scalability is often referred to as scaling up, while horizontal scalability is often referred to as scaling out.
Server clusters scale out horizontally. When a cluster requires more resources to improve performance and provide high availability (HA), the administrator can simply increase capacity by adding more servers to the cluster. The distributed storage system Cassandra also scales out horizontally, running on top of hundreds of commodity servers spread out across multiple data centers.
horizontal scalability
Horizontal scalability is an approach to increasing capacity that relies on connecting multiple hardware or software entities so they work as a single logical unit. Horizontal scalability can be contrasted with vertical scalability, which increases capacity by adding more resources (such as memory) to the same machine. Vertical scalability is often referred to as scaling up, while horizontal scalability is often referred to as scaling out.
Server clusters scale out horizontally. When a cluster requires more resources to improve performance and provide high availability (HA), the administrator can simply increase capacity by adding more servers to the cluster. The distributed storage system Cassandra also scales out horizontally, running on top of hundreds of commodity servers spread out across multiple data centers.
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