You must have a functional on-premises PowerExchange CDC environment that can capture change records from IDMS source data on a z/OS system and log the change records to a remote PowerExchange Logger on a Linux, UNIX, and Windows system. IDMS CDC Connector retrieves change records from the PowerExchange Logger for Linux, UNIX, and Windows log files.
You must have a license that allows your organization to use IDMS CDC Connector and PowerExchangeClient packages on a Linux or Windows system. On each system from which you plan to use IDMS CDC Connector, install the Secure Agent. After you start the Secure Agent the first time, the IDMS CDC Connector and the PowerExchangeClient package are installed locally. You can then use Cloud Data Integration, Administrator, and Monitor interfaces to configure IDMS CDC connections, mappings, and mapping tasks and to run and monitor mapping tasks.
The following image shows the general architecture of the IDMS CDC Connector components in relation to Cloud Data Integration, the remote IDMS source system, and the remote PowerExchange Logger for Linux, UNIX, and Windows system:
This configuration spans the following on-premises systems:
•The Windows system where the PowerExchange Navigator client runs.
•The z/OS system where the IDMS source, PowerExchange change capture routine (IDMS ECCR), PowerExchange Logger for z/OS, 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 IDMS CDC Connector components and Secure Agent run.
Based on this configuration, the following processing occurs:
1The PowerExchange capture routine actively captures change records from IDMS transaction logs and sends the records to the PowerExchange Logger for z/OS on a continuous basis.
To capture change records, the PowerExchange capture routine uses the capture registrations that are recorded in the PowerExchange CCT file. You defined a capture registration for the IDMS source data in the PowerExchange Navigator. The PowerExchange Navigator generated a corresponding extraction map, which will be used to extract the change records.
2Because remote logging is enabled, PowerExchange sends the change records that are in the PowerExchange Logger for z/OS log files to the remote PowerExchange Logger for Linux, UNIX, and Windows.
3The PowerExchange Logger for Linux, UNIX, and Windows logs the change records in its log files.
The pwxccl.cfg file defines the PowerExchange Logger configuration.
4When you design a mapping in Data Integration, you associate the Source transformation with an IDMS CDC connection. You can define the connection in either Data Integration or Administrator. The PWX CDC Metadata Adapter then uses the connection to connect to the PowerExchange Listener on z/OS and retrieve extraction map metadata for the IDMS source from the PowerExchange DTLCAMAP file.
In the mapping, you must also define a Target transformation and connection and map the source fields to target fields.
5The Secure Agent in conjunction with Data Integration sends the extraction map metadata to the Informatica Intelligent Cloud Services repository in the cloud.
6When 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.
7The PWX CDC Reader on the Secure Agent machine communicates with the PowerExchange Listener on the PowerExchange Logger for Linux, UNIX, or Windows machine to retrieve the change records from the PowerExchange Logger log files.
8Data Integration transmits the change records to the mapped target.
Alternative configurations of PowerExchange with the IDMS CDC Connector components and Cloud Data Integration are possible. For example:
•The PowerExchange Logger for Linux, UNIX, and Windows, the IDMS CDC Connector components, and the Secure Agent can all run on the same Linux or Windows system.
•The PowerExchange Navigator can run on any supported Windows system, including a Windows system where the PowerExchange Logger for Linux, UNIX, and Windows, IDMS CDC Connector, and Secure Agent run.
