on 01-29-2010 10:33 AM
I couldn't find a sufficient answer, why I should use the web dispatcher.
Is it because of the enhanced functionality ?
Or is there trouble in using the message server for dispatching http-requests?
Thanks,
Franz
To quote SAP:
You can use HTTP load balancing on the SAP Message Server for stateless applications only. For stateful Web applications with a state in the back end (such as BSP applications), you require the Web Dispatcher.
You can only use the SAP message server for HTTP load distribution if the browser is the direct client of the message server. If another component lies between the client (browser) and the message server, (for example, the portal), you cannot use the message server to distribute the load.
Nelis
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
Thank you, Nelis, I'm not quite sure, if the Service which is registered in SICF really is a BSP. I quess only the developer knows, if it is stateless or not ? What is the difference, if the browser connects directly to the application server (besides load balancing) ? Does this work with stateful sessions ?
I quess only the developer knows, if it is stateless or not ?
Yes, you should ask your developers if their applications will require state.
What is the difference, if the browser connects directly to the application server (besides load balancing) ? Does this work with stateful sessions ?
Yes this should work fine because there is no redirection from the message server. The Web Dispatcher stores your ip address in a table to maintain the state of the connection.
Nelis
Hi Nelis,
I know that this thread was opened a long time ago.
But I Have question regard mensage server:
" If another component lies between the client (browser) and the message server, (for example, the portal), you cannot use the message server to distribute the load."
If I user SAP PI as middleware layer, I can use mensage server instead of webdispatcher ?
Kind regard,
Ricardo Viana.
Yes you could although in general SAP recommends to use Web Dispatcher for load balancing instead of the HTTP message server. See SAP note 1040325 for details. Notice that for PI additional tuning might be necessary to achieve proper load balancing, see SAP note 1596109 for details. What kind of services are you planning to call from your PI system?
Hello Franz,
Refer to the following page for short decription of the main SAP Web Dispatcher functions:
http://help.sap.com/saphelp_nw04/helpdata/en/42/5cfd3b0e59774ee10000000a114084/content.htm
Functions
The SAP Web dispatcher performs the following tasks:
· Selects an appropriate application server (persistence with stateful applications, load balancing, ABAP or Java server), see Server Selection and Load Balancing Using the SAP Web Dispatcher.
· Filters URLs u2013 you can define URLs that are to be rejected, see SAP Web Dispatcher as a URL Filter
· Depending on the SSL configuration, forwards, terminates, and (re)encrypts requests. See SAP Web Dispatcher and SSL
The message server could do only starless-session load balancing.
Regards,
Ventsi Tsachev
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
User | Count |
---|---|
84 | |
25 | |
12 | |
9 | |
6 | |
6 | |
5 | |
5 | |
4 | |
4 |
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.