Logon Load Balancing

[Former Member]

Dear all,

I have a SRM 5.0 cluster system with two instances. We have a performance issue as the users logging in are not evenly distributed.

I know the way of logon load balancing when users enter via SAPgui but when do the same through http then how to perform this load balancing I have no idea.

Please recommend me or suggest me in this regard.

Thanks and Regards,

Piyush

[mercedes_fernandez · Accepted solution]

Hello Piyush,

SAP recommendation for HTTP load balancing is to use the SAP Webdispatcher. See SAP Note 1040325 and the online help at

http://help.sap.com/saphelp_nw2004s/helpdata/en/e9/3bb7f8f6ea4e938ef0b9687cbb6c14/frameset.htm

kind regards,

Mercedes

[Former Member · Accepted solution]

Hello,

Yes, I agree with Mercedes, the right way is to use a SAP Web Dispatcher. Message Server http load balancing should not be used. One example reason : users will save non load balancing favorites.

Regards,

Olivier

[pr_srinivas]

Hi....Piyush

Am sure, in the solution landscape of "PIYUSH"...if users are accesing directly

the SRM System, what Oliver & Merecdes said ways are right to access SRM System

thru a WEB Dispatcher which configured with Message Server port of HTTP of SRM (81NN)

When i was answering my question, I was assuming a EBP scenario ( Enterprise Buyer Professional) &

piyush is having Enterprise Portal and the browsing on to SRM System , where already single

sign was in place between EP & SRM.

So I was under impression the system object should be changed

80NN & 81NN to realize the load balanicng on SRM System.

So...Piyush...You reached destination...

Option-A) if you have EP, Configure System Object with 81NN Server Port.

Option-B) if you do not have EP, Install Webdispatcher & configure the Key parameters

rdisp/mshost = <srm_server_ip/hostanem/fqdn)

ms/http_port = 81NN

NB : Mercedes & Olivier - Please do correct me if my view is wrong.

Rgds

[mercedes_fernandez]

Hello,

as mentioned in note 1040325 the load balancing via the message is not possible if there is another component between the

browser and the message server (for example, a portal).

If the landscape is Browser --> Portal --> SRM backend, still is recommended for load balancing the SAP Webdispatcher

kind regards,

Mercedes

[pr_srinivas]

Am sure...you already aware the instance number.

ICM HTTP = 80NN = if instance number is "00" = 8000

MESSAGE SERVER HTTP = 81NN = if instance number is "00" = 8100

As you aware for GUI, if we reach 36NN ( Message Server Port )

it do a load balncing and redirects the to some application server dispatcher on to 32NN.

The same way when request reaches 81NN

The request will get redirected to 80NN....

jus type in brower

http://<srmserver.domain.com>:81NN

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it should automatically redirects to

http://<srmserver.domain.com>:80NN (you can realize the port switching 81NN to 80NN..is exactly is load balancing at HTTP)

Rgds

[pr_srinivas]

In Nutshelll

Hit the request on HTTP Message Server Port...to have load balanicng on HTTP Protocol.

Rgds

[pr_srinivas]

To have a deep dive understanding on SAP Ports

look at

http://service.sap.com/security

--> Security in Detail

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>Infrastructure Security

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>Donwload & Red the docuemnt "TCP/IP Ports Used by SAP Applications"

Rgds