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More webdispatchers on one "physical" server serving more WAS

Former Member
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Hi we have two different web AS which we both need to access from the

outside(HTTPS port 443). Normally you would just install two web dispatchers on two

different servers.

However it would of course be preferable if you could install the two

web dispatchers on one physical server.

I have seen a document by Jochen Rundholz where it's mentioned that

this is the recommended way to do it. Infortunately I have not been

able to find any more documentaion on how.

Do any of you have any more documentation on how to configure this?

Best regards

Flemming Grand

Accepted Solutions (0)

Answers (2)

Answers (2)

hofmann
Active Contributor
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Hi,

if the WebAS is Java, you'll have to take care of the JSESSIONID cookie. If you're just using 1 IP adress, the sessions from the different WebAS Java will overwrite the JSESSIONID cookie of the other server.

Best solution is the run every SAP Web Dispatcher under his own FQDN.

br,

Tobias

Former Member
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Hi Flemming

Hi,

We can install multiple web dispatcher on one host (with different SIDs)

Note: until release 7.20 (same kernel/web dispatcher also in 7.02) you need 1 wd per message server. It is also possible to cascade them. see note:

https://service.sap.com/sap/support/notes/740234

the mandatory rule is ONE webdispatcher per ONE message server until 7.02/7.20 (exception: dual stack setup with Java addin, which is not not recommended anymore by SAP except for Solution Manager

If you have only one ip:port for the internet, but several web dispacthers, becasue you have several system with several central systems/ message server, then you have to cascade the Webdispatcher. One Web Dspatcher collects all others WDs for the internet IP:port.

Virtual IP adresses is IMHO more relevant for high availability and/or ACC adaptive computing controlling if you want to move Systems to different physical hosts.

Also please check the following link:

https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/events/webinars-nw...

I hope the info in this helps you.

Regards

Chen

hofmann
Active Contributor
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Hi,

the mandatory rule is ONE webdispatcher per ONE message server until 7.02/7.20 (exception: dual stack setup with Java addin, which is not not recommended anymore by SAP except for Solution Manager)

You can have 1 MS and several Web Dispatcher connected to that MS.

In Dual Stack, you'll too just need 1 Web Dispatcher. The ABAP MS will do the dispatching for the Java part (1 CI). The Web Dispatcher also does analyze the Client HTTP request and will understand if it is an ABAP or Portal / Java URL.

br,

Tobias