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# Persistence Service Fault Tolerance

Replication of data among a quorum of persistence services ensures that the cluster as whole remains complete and correct, despite temporary outage of some of its services.

For best results, insulate each persistence service host from the other persistence services and the factors that might make them unavailable. For example, ensure that service hosts rely on separate power circuits and separate network infrastructure.

Do not locate persistence service hosts at geographically distant sites, as that would increase communication latency.

Note: This level of fault tolerance alone is not sufficient to support disaster recovery. For information about the disaster recovery feature, see Disaster Recovery.

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TIBCO FTL® - Enterprise Edition

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