Chapter 7. Clustering


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Cluster mode is the solution for high performance system. It offers Load Balancing and High Availability features.

A Platform cluster is a set of nodes that communicate via JGroups - UDP or TCP - in the back-end, and a front-end Load Balancer like Apache that distributes HTTP requests to the nodes. The High Availability is achieved in the data layer natively by the RDBMS or Shared File Systems, such as SAN and NAS.

The following diagram illustrates a cluster field with two nodes (each node uses its local JCR index storage, but you can enable shared JCR indexing, as described in the chapter).

In this chapter:

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