Install multiple ASCS on single cluster group

[Former Member]

In our SAP landscape we have about 8 application (ECC, BW, SRM, PI, GRC, DUET, SolMan, CPS).  Right now each application has its own cluster group.  (i.e. ECC ASCS/ERS installed on Srv1NodeA & Srv1NodeB, BW installed on Srv2NodeA & Srv2NodeB and on).

Most of the cluster servers in our environment is built on VM.  As you may know, Windows clustering is not ideal.  Since ASCS/ERS is not resource intensive we would like to use one cluster group to run multiple application.  In other word install ECC, SRM, CPS & PI on Srv1NodeA and Srv1NodeB.  The setup will be active/passive group where any application could be run on either node.  ECC on nodeA, SRM on nodeB, CPS on NodeB and PI on NodeA.

Does SAP have any best practice as far installing running multiple application on same cluster group?  What are your thoughts on setting up something similar to this?

Love to hear your ideas and thoughts.

Rojan

[Former Member · Accepted solution]

Hi Rojan,

Yes you can use your scenario. The only concern is about the System Number because it's related with port that will be use by the message server. Just make sure that each application have different System Number for the message server.

Hope this help you.

Regards,

Dhanar

[Former Member]

Thank you for your response. Few follow up question...

Is there any sizing document on message server?  Also, is there recommendation on number of application we can run on single cluster group?

Rojan

[isaias_freitas]

Hello,

As long as each ASCS/SCS/ERS has its own instance number, as said, you just need to ensure that you have enough hardware power (CPU, memory) to handle all instances.

The ASCS/SCS also runs the standalone enqueue server, not only the message server.

The message server should not use that much memory/CPU. The enqueue, in the other hand, is more CPU/memory intensive. The ERS also uses more memory/CPU.

The enqueue and ERS would use a bit more memory than the parameter "enque/table_size".