Load Balancing b.w CI and DI

[Former Member]

Hello All,

I've installed the MSCS system with 1 Dialog Instance. Now i have 1 CI(Central Instance) URL and 1 DI URL.

Now my concern is if my Users uses the CI URL to launch the Portal. So does the J2EE sends the requests to DI also automatically OR do we need to do some configuration.

As far as i know we dont have to perform any kind of post activities after adding the DI into the landscape.

Regards

Vaib

[Former Member]

Hi Vaib,

to loadbalance between different SAP WebAS Instances (CI & DI) you would need a loadbalancing instance like the SAP WebDispatcher, Reverse Proxy or a hardware loadbalancer.

Check out this link for more info: http://help.sap.com/saphelp_nw04/helpdata/en/b5/e8239ef7bd494f896a84625d4b688f/frameset.htm

Hope this helps,

Robert

[Former Member]

Robert,

Can we setup like the Dispatcher of CI can forward the requests to DI also. We had this in the WAS 6.20, so i'm usre it should be here in the WAS 6.40 also.

Any Ideas.

Vaib

[Former Member]

Also, DI also uses the same SCS instance which means the same message and enqueue server. So dont you think that the message server should send the requests to the server node on DI also.

Regards

Vaib

[Former Member]

Yes but the point of the message server is not to load balance HTTP requests. The dispatchers job is to send HTTP requests to server nodes.

[Former Member]

Eric,

Do you remember we have a parameter in WAS 6.20 (configtool -> CluseterHosts) which if set to true then the dispathcer on CI can send the requests to the server nodes on DI's also.

Do we have a parameter in WAS 6.40??

Vaib

[Former Member]

I think that parameter exists but I am not sure what it is called. You should be able to find it on help.sap.com. SAP specifically recommends against what you are doing though.

http://help.sap.com/saphelp_nw04/helpdata/en/b5/e8239ef7bd494f896a84625d4b688f/frameset.htm

[Former Member]

So do i need to have WebDisp in front of the CI and DI??

Vaib

[Former Member]

Hi Vaib,

as stated in my first post and also by Eric, this IS the recommendation by SAP. In addition to the given link (by me and also by Eric ) you can also check this statement here: http://help.sap.com/saphelp_nw04/helpdata/de/00/bfb59803a84d6cae3f4ed300efa168/frameset.htm

Best regards,

Robert

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