Setting up access to CICS for Data Replication for VSAM

The target CICS® region uses a z/OS® IP CICS socket (or CICS listener) to communicate with the apply service in the target server.

About this task

In the Data Replication for VSAM environment, there is one CICS target region per target server, with a CICS listener started.

The apply service that runs in the target server establishes multiple connections with CICS by using the z/OS IP CICS socket when the server starts.
  • A connection to the CICS replication utility
  • A connection to each instance of a CICS replication writer that is started
As changes arrive at the target server, the apply service schedules independent work for a started CICS replication writer by sending each change on a specific connection.

If you are setting up multiple replication environments, you must set up one z/OS IP CICS socket per target CICS region.

To ensure that your CICS listener is active, you can issue the following TSO command on the apply server: DISPLAY TCPIP,procname,NETSTAT,CONN. You can also issue this command from the system console on the target server to display the listeners.

For information about setting up a CICS listener, see the section about setting up and configuring CICS TCP/IP in the z/OS Communications Server: IP CICS Sockets Guide.

Procedure

  1. Using the information in the CICS Sockets Guide, set up a z/OS IP CICS socket for the use of your target server.
  2. Keep the port number of the z/OS IP CICS socket for reference.

    You will use the port number when you set up CICS resource definitions for Data Replication for VSAM and configure your target server.