HTTP Load Balancing in 6.40

[Former Member]

We have 2 app servers and the CI on 6.40 and would like to load balance between the 2 app servers. We have set the ms/server_port_0 = PROT=HTTP,PORT=8100. (Which for some reason rsparam has flagged as red.) We have set parameter ms/http_port = 8100 in each of the app servers. In SICF we have activated both sap/public/icf_info/urlprefix and sap/public/icf_info/logon_groups. When we run a BW querry it runs just to the CI.

A couple of questions: 1) In the 2 SICF services there is a place for logon groups, is this a pre-requisite and if so, can a normal GUI logon group work that is just pointing to the 2 app servers? If they don't work, how do you create a logon group just for HTTP load balancing? 2) Is there some other settings that we could be missing?

Any help on this matter would greatly be appreciated as we have been struggling with this for some time.

Thanks,

Jared

[Former Member · Accepted solution]

Hi Jared,

saplb_<group_id> is for SAP WEB dispatcher.

Dont know if this helps you:

http://help.sap.com/saphelp_erp2005vp/helpdata/en/05/d5ca3d695f2051e10000000a114084/frameset.htm

Regards.

Ruchit.

Message was edited by:

Ruchit Khushu

[Former Member · Accepted solution]

Thanks for the response but we are not using the Web Dispatcher. We are trying to do the load balancing of the HTTP requests through the MS only. We have configured each of the parameters that are required for this that we can find, with no luck.

I have the GUI logon groups setup, but are unsure if we can use these for HTTP or do we need to create specific groups for it. If we need new groups then were do we create them?

Any help would be greatly appreciated.

Jared

[Former Member · Accepted solution]

Here you can find HTTP Load Distribution Using SAP Message Server

http://help.sap.com/saphelp_erp2005vp/helpdata/en/28/75153a1a5b4c2de10000000a114084/content.htm

Cheers,.

-Sunil

[Former Member · Accepted solution]

Hi Sunil,

I guess Jared has already implemeted the solution mentioned on this link and still he is getting this error. So we are back to square one )

Hi Jared,

If my understand is correct then you BW query will be actually pointing to a lhttp ink/url or hostname string which will have the CI hostname mentioned in it mentioned.

I think in such cases where you are explicitily giving a hostname destination logon balancing may not be possible.

We have R/3 servers which interact with variety of third party tools like hummingbord,cognos etc. and in such cases they can only link up with only one single application server at a given time as per the settings maintained there.

I really dont think for such cases logon balancing may be possible. Though I might as well be wrong.

Regards.

Ruchit.

[Former Member · Accepted solution]

Hi Ruchit,

Yes I have implemented the information that Sunil provided earlier.

As far as hard coding the links, we are pointing it to the Message Server port (8100), which will resolve back to the CI port 8000. My question is in the services of the urlprefixes and the logon_groups are the GUI logon groups maintained in SMLG the correct groups or do you need to create new HTTP logon groups. In the link that Sunil provided this is how it described setting it up. If the logon groups are maintained in SICF then the CI will route any traffic to the relevant app server based on load balancing.

We have recently performed a hardware upgrade and are 99.99% certain that this worked correctly in the past but don't have access to either a backup or the profile parameters of the old system.

Thanks,

Jared

[Former Member · Accepted solution]

Hi Jared,

If you are sure it worked in past then I am defintely wrong.

May be this link might help you:

/message/3056164#3056164 [original link is broken]

Are you sure that your all your users are using load balancing? This thread gives an idication towards that.

Check this as well:

https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/211333f8-0c01-0010-4587-de3...

Please award points accordingly.

Regards.

Ruchit.

[Former Member · Accepted solution]

Yes I have seen this thread while researching my problem. It really didn't help much. I am not sure if it is just my oversight or what but I am unable to resolve this problem.

Thanks so much for your help.

Jared

[Former Member]

Hi Jared,

Please check this link :_

http://help.sap.com/saphelp_nw04s/helpdata/en/58/d0643e4cce3f7ce10000000a114084/content.htm

and this also.

http://help.sap.com/saphelp_nw04/helpdata/en/42/5cfd3b0e59774ee10000000a114084/frameset.htm

it gives informaation for J2ee logon groups.

Please award points accordingly.

Regards.

Ruchit.

Message was edited by:

Ruchit Khushu

[Former Member]

Both of these solutions require that Web Dispatcher be installed. We do not have the Web Dispatcher. We are wanting to use the MS to do the load balancing. Any suggestions.

[Former Member]

ok, follow URL : http://help.sap.com/saphelp_erp2005vp/helpdata/en/93/33b504f33cb9468bf35f8fbda11294/frameset.htm

Cheers,

-Sunil

[Former Member]

Sorry for my misunderstanding of this but were do you set the parameter saplb_<group_id>? I have looked all throught the VA and can't find the setting. Thanks for your help.

[Former Member]

http://help.sap.com/saphelp_erp2005vp/helpdata/en/f2/d7914b8deb48f090c0343ef1d907f0/frameset.htm

[Former Member]

Follow URL http://help.sap.com/saphelp_erp2005vp/helpdata/en/93/33b504f33cb9468bf35f8fbda11294/frameset.htm

Cheers,

-Sunil