The data that the Integration Servers share is stored in distributed caches on a Terracotta Server Array. A Terracotta Server Array is a group of one or more Terracotta Servers. The data associated with a cache is spread across the servers in the array (each server maintains a portion of the cache). You can mirror the servers in the array for high availability. For more information about Terracotta Server Arrays, see the Terracotta product documentation.

You must install and configure the Terracotta Server Array before you enable clustering on the Integration Servers. For the list of general steps that you must perform before you enable clustering, see Setting up the Terracotta Server Array for Use by the Cluster of Integration Servers.