how to enable and check sap load balancing in dual stack system without web dispatcher

[former_member265504]

Hi All,

We have Dual stack system with two instance(one on pure dialog instance another ABAP+JAVA instance) and the SCS instance without any web dispatcher.

Please let me know how to check if Load balancing is enabled in this system and in case if load balancing is not enabled how to enable it.

Thanks & Regards,

Rajdeep

[alwina_enns · Accepted solution]

Hello Rajdeep,

for which connections do you need load balancing? HTTP, GUI or RFC? For load balancing of HTTP connections through message server please have a look at the documentation:

Message Server-Based Logon and Load Balancing (Redirection) - SAP High Availability - SAP Library

and

HTTP Load Distribution Using SAP Message Server - SAP Web Dispatcher - SAP Library

Regards,

Alwina

[former_member265504]

Hi Martina & Alwina, Thank you very much for the helpful reply. I had three queries on the above blogs and documentation that you shared. 1. Will the HTTP Load balancing mentioned in the document will work for the landscape where there is one ABAP and Dual stack instance? 2. In one of the documents it is mentioned- To configure the message server to accept HTTP and HTTPS requests, you have to set the following parameters ●  ms/http_port ●  ms/https_port In other- The outdated parameters ms/http_port and ms/https_port do still function for compatibility reasons, but should not be used any longer. 3. And finally the action plan. Actually I am a bit cautious as I am implementing this directly in production so have to be sure what I am doing is correct. Please look at the below action plan and let me know if I need any modification on any point- Following changes needs to be done to enable the HTTP load balancing service- 1. Parameter ms/ server_port_ must be set in the profile of the message server 2. The following ICF services must be activated (transaction SICF). /default_host/sap/public/icf_info /default_host/sap/public/icf_info/logon_groups /default_host/sap/public/icf_info/urlprefix 3. You cannot work with additional Virtual Hosts if you want to use HTTP load distribution managed by the message server 4. Use the direct link of message server after the above parameter changes are done(currently if I try to browse this link it doesnot show anything) http://.://Thanks in advance for helping me out with your valuable feedback. Thanks & Regards, Rajdeep

[Martina_Gállego]

Hi Rajdeep,

To add to Alwina answer, you could check too the following blog:

http://scn.sap.com/people/pise.mangesh/blog/2011/08/19/load-balancing-abap-webdynpro-services

http://scn.sap.com/thread/3568369

Best regards,

Martina