Oracle CDC V2 Connector > Introduction to Oracle CDC V2 Connector > Integration with the PowerExchange CDC environment
  

Integration with the PowerExchange CDC environment

You must have a functional on-premises PowerExchange Express CDC for Oracle on Linux, UNIX, or Windows environment that can capture change records from Oracle source tables and log them to PowerExchange Logger for Linux, UNIX, and Windows log files. Also, you must have a license that allows your organization to use the Oracle CDC Connector and PowerExchangeClient packages on Linux or Windows.
On each system from which you plan to use Oracle CDC Connector, you must install the Secure Agent. After you start the Secure Agent the first time, the Oracle CDC Connector and PowerExchangeClient components are installed locally. You then can use Cloud Data Integration, Administrator, and Monitor interfaces to configure Oracle CDC connections, mappings, and mapping tasks and to run and monitor mapping tasks.
The following image shows the general architecture of the Oracle CDC Connector components with Cloud Data Integration and a remote PowerExchange Express CDC for Oracle source system:
On-prem PowerExchange components and Oracle source in relation to on-prem Oracle CDC V2 Connector and Data Integration components on a separate system. Shows data flow from the source to target and source metadata flow to the cloud repository.
In this configuration, the PowerExchange Express CDC for Oracle environment resides on one Linux, UNIX, or Windows system and the Oracle CDC Connector environment resides on another Linux or Windows system. The PowerExchange Navigator runs on a Windows system apart from both environments. Based on this image, the following processing occurs:
  1. 1PowerExchange Express CDC for Oracle actively captures change records from Oracle redo logs and sends the records to the PowerExchange Logger for Linux, UNIX, and Windows on a continuous basis.
    2. To capture change records, the PWX Express CDC Reader uses the capture registrations and extractions maps that you defined in the PowerExchange Navigator for the Oracle source tables.
  2. 2The PowerExchange Logger logs the change records in its log files.
    3. The PWXCCL file defines the PowerExchange Logger configuration.
  3. 3When you design a mapping in Data Integration, you associate the Source transformation with an Oracle CDC connection. You can define the connection in either Data Integration or Administrator. The PWX CDC Metadata Adapter then uses the Oracle CDC connection to connect to the PowerExchange Listener and retrieve extraction-map metadata for the Oracle source from the PowerExchange CAMAPS file.
    4. In the mapping, you must also define a Target transformation and connection and map the source fields to target fields.
  4. 4The Secure Agent in conjunction with Data Integration sends the extraction-map metadata to the Informatica Intelligent Cloud Services repository in the cloud.
  5. 5When you run the mapping task that is associated with the mapping, all of the CDC metadata, connection properties, mapping information, advanced source properties, CDC runtime properties, and advanced session properties are pushed down to the on-premises Secure Agent in the form of a session .xml file.
  6. 6The PWX CDC Reader on the Secure Agent machine communicates with the PowerExchange Listener to retrieve the change records from PowerExchange Logger log files.
  7. 7Data Integration transmits the change records to the mapped target.
Alternative configurations of PowerExchange with the Oracle CDC Connector components and Cloud Data Integration are possible. For example: