SAP Web Dispatcher

Objectives

After completing this lesson, you will be able to:

  • Parameterize SAP Web Dispatcher

Parameterization of SAP Web Dispatcher

Introduction

Similar to the ICM process, SAP Web Dispatcher is configured using parameters. The default values are selected so that you do not have to make any changes to these parameters. You determine the point of access to your SAP system using parameter icm/server_port_<x>.

You can use the parameters to adapt the configuration to specific system requirements.

Since the SAP Web Dispatcher connects itself to the SAP message server and communicates with it via HTTP, parameter wdisp/system_<x> must be set correctly in the SAP Web Dispatcher profile.

Note
For a complete list of those parameters, see the online documentation, topic SAP Web Dispatcher: Parameter References.

You have multiple options to change parameters of SAP Web Dispatcher.

Change Profile and (Re)start SAP Web Dispatcher

One option is to change a parameter in the instance profile of SAP Web Dispatcher with a text editor of your choice.

Use one of the following tools to start a stopped SAP Web Dispatcher:

  • SAP Management Console (SAP MC)
  • SAP Microsoft Management Console (SAP MMC)
  • command line tool sapcontrol (option -function StartSystem ALL)
  • command line tool sapwebdisp (option pf=<InstanceProfile>)

Use one of the following tools to restart a running SAP Web Dispatcher:

  • SAP Management Console (SAP MC)
  • SAP Microsoft Management Console (SAP MMC)
  • command line tool sapcontrol (option -function RestartSystem ALL)
  • command line tool sapwebdisp (option pf=<InstanceProfile>)
  • Web Administration interface of SAP Web Dispatcher (Shutdown or Soft Shutdown)

Change Profile and Reconfigure SAP Web Dispatcher

An alternative approach is to reconfigure a running SAP Web Dispatcher after you changed a parameter in its instance profile. As a prerequisite, ensure that parameter wdisp/config_reload is set to TRUE (the default value is FALSE).

To trigger the reconfiguration of a running SAP Web Dispatcher issue the following command at command line level:

sapwebdisp pf=<InstanceProfile> -reconfig profile

Change Parameter using the Web Administration Interface

The Web Administration interface also allows you to change parameters. To do so, navigate to Core SystemParametersEdit Parameters.

After entering a parameter Name, choose Get Value. In case of a valid entry, a short Description and the Type of the parameter is displayed.

Many, but not all parameters are dynamically changeable. In case of a dynamically changeable, you have the option to change it temporarily. Similar to a change of a dynamic parameter in AS ABAP (transaction RZ11), the change is being applied immediately, but lost after a restart of SAP Web Dispatcher.

If you choose to change the parameter permanently, the change is applied to the instance profile of SAP Web Dispatcher. Also, a backup of the former instance profile is created (in the backup sub-directory of the profile path). In case of a dynamically changeable parameter, the change is also applied to the running SAP Web Dispatcher.

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