Manage the TCP/IP server

 

These topics describe how to manage the DRDA^® and DDM server jobs that communicate using sockets over TCP. It describes the subsystem in which the server runs, the objects that affect the server, and how to manage those resources.

The DRDA and DDM TCP/IP server that is shipped with the i5/OS^® program does not typically require any changes to your existing system configuration in order to work correctly. It is set up and configured when you install i5/OS. At some time, you might want to change the way the system manages the server jobs to better meet your needs, solve a problem, improve the system's performance, or look at the jobs on the system. To make such changes and meet your processing requirements, know which objects affect which pieces of the system and how to change those objects.

These topics describe, at a high level, some of the work management concepts that need to be understood in order to work with the server jobs and how the concepts and objects relate to the server.

• DDM terminology
  The same server is used for both DDM and DRDA TCP/IP access to DB2 Universal Database™ for iSeries™.

• TCP/IP communication support concepts for DDM
  Several concepts pertain specifically to the TCP/IP communications support used by DRDA and DDM.

• DDM server jobs
  This topic collection provides information for working with server jobs.

• Configure the DDM server job subsystem
  By default, the DDM TCP/IP server jobs run in the QUSRWRK subsystem. Using iSeries Navigator, you can configure DDM server jobs to run all or certain server jobs in alternate subsystems based on the client's IP address.

• Identify server jobs
  If you look at the server jobs started on the system, you might find it difficult to relate a server job to a certain application requester job or to a particular PC client. Being able to identify a particular job is a prerequisite to investigating problems and gathering performance data. iSeries Navigator provides support for these tasks that make the job much easier.

 

Parent topic:

Operating considerations for DDM

 

Related concepts

Managing work

 

Related reference

Create a DDM file using TCP/IP