Starting the SAP Web Dispatcher

SAP Management Console

You can start the SAP Web Dispatcher from the SAP Management Console (or from SAP MMC under Windows).

Command line

You start the SAP Web Dispatcher with the command:

sapwebdisp pf=<profile name> [-f <trace file> -t <trace level> -cleanup -shm_attach_mode <mode> -auto_restart -version]

The optional parameters have the following meaning:

• You can use -f to determine the name of the trace file. Default is dev_webdisp.

• You can use option -t to set the trace level.

• -cleanup means that common resources (shared memory and so on) are released. This is necessary if the SAP Web Dispatcher ran was not stopped in an orderly manner the last time it ran, but was terminated by a crash.

• -shm_attach_mode <mode> determines what should happen to the shared memory of the SAP Web Dispatcher. Here, <mode> is a number that is a combination of the following values (bit mask):

  1: Delete the shared memory of the SAP Web Dispatcher (“cleanup”)

  2: Try to connect to the shared memory (“attach”)

  4: Create a new shared memory (“create”)

  This results in the following possible options:

  <mode>	Meaning
  1	The shared memory is cleaned up and the SAP Web Dispatcher terminates. The behavior is the same as with the option –cleanup.
  2	The SAP Web Dispatcher connects to the existing shared memory (attach). If this does not exist, the SAP Web Dispatcher ends with an error.
  3	Not useful
  4	The SAP Web Dispatcher creates a new shared memory. If this exists already, the SAP Web Dispatcher ends with an error.
  5	If a shared memory exists already, it is deleted. A new shared memory is then created.
  6	The Web Dispatcher attempts to attach itself to an existing shared memory. If a shared memory does not exist, a new one is created. This is also the default value, and the SAP Web Dispatcher behaves like this if options -shm_attach_mode <mode> and -cleanup are not used, and parameter wdisp/shm_attach_mode is not explicitly set to another value.
  7	As 5

  Note

  These settings are useful for managing SSL client IP addresses. With the appropriate settings, this information does not get lost in the SHM, but can be reused if the SAP Web Dispatcher crashes.

• -auto_restart: With this option you can enable high availability for the SAP Web Dispatcher at process level.

• -version displays the version of the SAP Web Dispatcher. The program is not started.

Setting up SAP Web Dispatcher as a Windows service

In Windows you can start the SAP Web Dispatcher as a service. It will then always be started automatically whenever the computer is restarted.

Call the following:

ntscmgr install sapwebdisp -b <path>\sapwebdisp.exe -p "service pf=<profile file> <options>"

<path> stands for the path in the file system where the program is stored, <options> for more parameters as described above. If the path contains blank characters, you have to enclose the path in quotation marks (for example: -b "C:\Program Files\sapwebdisp.exe" ...).

You then see the SAP Web Dispatcher sapwebdisp in the list of services.