What Is High Availability Cluster?

1.	What Is High Availability Cluster?
Answer» HIGH availability clusters provide highly available services by eliminating SINGLE points of failure and by failing over services from one cluster node to another in case a node becomes inoperative. Typically, services in a high availability cluster read and write data (via read-write mounted file systems). A high availability cluster must maintain data integrity as one cluster node takes over control of a service from another cluster node. Node FAILURES in a high availability cluster are not visible from CLIENTS outside the cluster. High availability clusters are SOMETIMES referred to as failover clusters.

Answer»

HIGH availability clusters provide highly available services by eliminating SINGLE points of failure and by failing over services from one cluster node to another in case a node becomes inoperative.
Typically, services in a high availability cluster read and write data (via read-write mounted file systems).
A high availability cluster must maintain data integrity as one cluster node takes over control of a service from another cluster node.
Node FAILURES in a high availability cluster are not visible from CLIENTS outside the cluster.
High availability clusters are SOMETIMES referred to as failover clusters.

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