Integration with the PowerExchange CDC environment
You must have a functional on-premises PowerExchange CDC environment that can capture change records for Datacom source tables on a z/OS system and log the changes to a remote PowerExchange Logger on Linux, UNIX, and Windows system. The Datacom CDC Connector retrieves change records from the PowerExchange Logger log files.
You must have a license that allows your organization to use the Datacom CDC Connector and PowerExchange Client packages on a Linux or Windows system. On each system from which you plan to use Datacom CDC Connector, install the Secure Agent. After you start the Secure Agent the first time, the Datacom CDC Connector and PowerExchange Client package are installed locally. You then can use Cloud Data Integration, Administrator, and Monitor interfaces to configure Datacom CDC connections, mappings, and mapping tasks and to run and monitor mapping tasks.
The following image shows the general architecture of the Datacom CDC Connector components in relation to Cloud Data Integration, the remote Datacom source system, and the remote PowerExchange Logger system:
This configuration spans the following on-premises systems:
•The Windows system where the PowerExchange Navigator client runs.
•The z/OS system where the Datacom source, PowerExchange change capture routine, UOW Cleanser, and PowerExchange Listener run.
•The remote PowerExchange Logger for Linux, UNIX, and Windows system with another PowerExchange Listener instance.
•The Linux or Window system where the Datacom CDC Connector components and Secure Agent run.
Based on this configuration, the following processing occurs:
1PowerExchange CDC for Datacom actively captures change records from Datacom source tables and sends the records to the PowerExchange Logger on a continuous basis.
To capture change records, PowerExchange uses the capture registrations and extractions maps that you defined in the PowerExchange Navigator for the Datacom source tables.
2The PowerExchange Logger logs the change records in its log files.
The pwxccl.cfg file defines the PowerExchange Logger configuration.
3When you design a mapping in Data Integration, you associate the Source transformation with a Datacom CDC connection. You can define the connection in either Data Integration or Administrator. The PWX CDC Metadata Adapter then uses the Datacom CDC connection to connect to the PowerExchange Listener and retrieve extraction-map metadata for the Datacom source from the PowerExchange CAMAPS file.
In the mapping, you must also define a Target transformation and connection and then map the source fields to target fields.
4The Secure Agent in conjunction with Data Integration sends the extraction-map metadata to the Informatica Intelligent Cloud Services repository in the cloud.
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.
6The PWX CDC Reader on the Secure Agent machine communicates with the PowerExchange Listener to retrieve the change records from PowerExchange Logger log files.
7Data Integration transmits the change records to the mapped target.
Alternative configurations of PowerExchange with the Datacom CDC Connector components and Cloud Data Integration are possible. For example:
•The CDC Connector components, and Secure Agent can run on the same Linux or Windows system.
•The PowerExchange Logger for Linux, UNIX, and Windows and its log files can reside on a system that is remote from the Datacom source system and remote from the Linux or Windows system where the Datacom CDC Connector components and Secure Agent run. By logging change data to a remote PowerExchange Logger, you can reduce resource consumption on the source system and possibly reduce the network overhead of data transfer. For more information, see "Remote Logging of Data" in the PowerExchange CDC Guide for z/OS.
•The PowerExchange Navigator can run on any supported Windows system, including a Windows system where the Datacom database or Secure Agent runs.
