topic Dispatcher & Work Process in Application Development and Automation Discussions

Dispatcher & Work Process

Former Member — Mon, 19 Nov 2007 11:09:02 GMT

Hi,

How does Dispatcher & Work Process co-ordinate the functioning in the SAP system.

Thanks

Re: Dispatcher & Work Process

Former Member — Mon, 19 Nov 2007 11:12:54 GMT

Hi,

Refer this link:

http://help.sap.com/saphelp_nw04/helpdata/en/05/0e41e6ba5911d188b20000e83539c3/frameset.htm

The requests are first saved in the queue by the dispatcher and then processed according to the principle of “first-in, first-out.”

see this link

http://aspalliance.com/1128_SAP_R3_System_Architecture

regards,

Omkar.

Re: Dispatcher & Work Process

Former Member — Mon, 19 Nov 2007 11:13:50 GMT

Event dispatchers monitor database instances. If a defined situation arises in a database instance monitored by an event dispatcher and the database system triggers an event, the event dispatcher then performs a defined task.

Work processes execute the individual dialog steps in R/3 applications. The next two sections describe firstly the structure of a work process, and secondly the different types of work process in the R/3 System.

Re: Dispatcher & Work Process

Former Member — Mon, 19 Nov 2007 11:15:24 GMT

while work process execute the piece of task, it is the job of dispatcher to direct processing to the work process that is available, it handles roll in and roll out of memory and uses algorithms to balance the load

Re: Dispatcher & Work Process

Former Member — Mon, 19 Nov 2007 13:47:29 GMT

To process SAP requests from several front ends, an SAP application server has a dispatcher, which collects the requests and forwards them to work processes for execution.

There are the following types of work process:

Dialog

For executing dialog programs

Update

For asynchronous database updates

Background (batch)

For executing background jobs

Enqueue

For executing lock operations

Spool

For print formatting

Work processes can be assigned to dedicated application servers. In the service overview (SM51), you can see which work process types are provided by the individual servers.

Re: Dispatcher & Work Process

Former Member — Mon, 19 Nov 2007 14:36:49 GMT

Thanks for all the replies.