APPLETON, Wis. — Two heads are better than one, it's said. Just ask the credit unions making the switch to a clustered server environment.

A cluster system can be simply defined as two or more information processing systems acting in unison to provide a network resource or application transparently to a user. What it means to the end user, in this case the credit union, is knowing that if one server fails, the other automatically takes over.

There are generally two kinds of clustered systems, the failover and the shared database. A typical failover system uses only one server at a time, relying on the second as a backup.

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