Architecture of Talend Data Preparation in cluster mode

The following diagram illustrates the architecture behind Talend Data Preparation and Talend Dictionary Service when set up in cluster mode.

This architecture is composed of several functional blocks:

• A Load Balancer, that distributes the workload from the different users accessing the Talend Data Preparation instances at the same time as well as the Talend Dictionary Service server(s).
  Information noteNote: The same Load Balancer can be used for Talend Data Preparation, Talend Data Stewardship and Talend Dictionary Service. In addition, the Load Balancer can be either physical or logical.
• The Talend Data Preparation instances.
• The Talend Dictionary Service instances that you can optionally install if you want to add, remove, or edit the semantic types used on data in Talend Data Preparation.
• A block containing the various components necessary for Talend Data Preparation and Talend Dictionary Service to work, namely several instances of MongoDB for storage, Kafka and ZooKeeper for messaging, and an instance of Talend Administration Center to manage authorizations.