Informatica integration service configuration-Informatica integration service architecture

The Integration Service moves data from sources to targets based on workflow and mapping metadata stored in a repository. When a workflow starts, the Integration Service retrieves mapping, workflow, and session metadata from the repository. It extracts data from the mapping sources and stores the data in memory while it applies the transformation rules configured in the mapping. The Integration Service loads the transformed data into one or more targets. Figure below shows the processing path between the Integration Service, repository, source, and target: 

To move data from sources to targets, the Integration Service uses the following components: 

• Integration Service process. The Integration Service starts one or more Integration Service processes to run and monitor workflows. When you run a workflow, the Integration Service process starts and locks the workflow, runs the workflow tasks, and starts the process to run sessions. 
• Load Balancer. The Integration Service uses the Load Balancer to dispatch tasks. The Load Balancer dispatches tasks to achieve optimal performance. It may dispatch tasks to a single node or across the nodes in a grid. 
• Data Transformation Manager (DTM) process. The Integration Service starts a DTM  process to run each Session and Command task within a workflow. The DTM process performs session validations, creates threads to initialize the session, read, write, and transform data, and handles pre- and post- session operations.

The Integration Service can achieve high performance using symmetric multi-processing systems. It can start and run multiple tasks concurrently. It can also concurrently process partitions within a single session. When you create multiple partitions within a session, the Integration Service creates multiple database connections to a single source and extracts a separate range of data for each connection. It also transforms and loads the data in parallel. Integration Service can be created on a Windows or UNIX server machine. The Integration Service could be configured using the Administration Console or the pmcmd command line program.