CDC Guide for z/OS

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PowerExchange Agent Overview

The PowerExchange Agent is a PowerExchange CDC component that provides services to other PowerExchange CDC components. It runs as a started task in a separate address space.

The PowerExchange Agent has the following characteristics:

The PowerExchange Agent interacts with the following PowerExchange CDC components:

PowerExchange Listener

Environmental Change Capture Routines (ECCRs)

PowerExchange Logger for z/OS

The PowerExchange Agent provides the following services to the other CDC components:

Gets and manages global queues for the PowerExchange CDC components.

Gets new or modified capture registrations from the PowerExchange Listener.

Manages data flow between PowerExchange CDC components that run in different address spaces.

Manages requests from ECCRs for capture registration information.

Provides access to authorized users.

Provides a common message log.

Start the PowerExchange Agent started task after you start the PowerExchange Listener and before you start the PowerExchange Logger and ECCRs. The following start order is recommended:

PowerExchange Listener

PowerExchange Agent

PowerExchange Logger

ECCRs

The PowerExchange Agent connects to a single PowerExchange Listener. By default, the PowerExchange Agent gets capture registration information from the PowerExchange Listener.

If you run more than one PowerExchange Listener on the z/OS system and create, edit, or delete capture registrations, make sure that you use the PowerExchange Listener on z/OS that interacts with the PowerExchange Agent. This requirement applies to registration changes that you make from the PowerExchange Navigator and with the DTLUCBRG and DTLURDMO utilities. The PowerExchange Agent can then refresh its memory cache with information from the CCT file that reflects the registration changes.

The PowerExchange Agent uses the AgentID parameter in the AGENTCTL member, to which the EDMSCTL DD in the Agent JCL points, to create its z/OS subsystem. Use the AgentID to communicate with the PowerExchange Agent address space.

You can control certain aspects of PowerExchange Agent processing by issuing commands from the MVS system console.

The PowerExchange Agent cannot run as a batch job.

PowerExchange Agent

Running Multiple Instances of the PowerExchange Agent

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