Muliple SAP Systems in one Microsoft Failover Cluster- Need Clarifications

[tamil_arasan]

Dear Experts,

We are planing to install 2 SAP systems in one Microsoft Failover Cluster. In the cluster node, if we do partition 3 drives (SAP data, Oracle and ASCS) can we we use the same drives for another SAP server? if yes, will failover occurs for both SAP systems even one SAP application node goes down?

or else it is recommended to have separate drives for each SAP applications?

What are all the cons and pros? any specific configuration needs to be done apart from sapmnt path renaming?

Please provide your suggestions.

Thanks a lot,

Pradeep

[Sriram2009 · Accepted solution]

Hi Pradeep

Yes you can install the two SAP SID on one Failover Cluster. We have installed the Two SAP production systems in one MSCS environment(Two node MSCS cluster). which is working fine.

Disk configurations, You have to use the Each SAP SID different cluster disk, Virtual Name & IP

1. MSCS Cluster Virtual IP and Name - Quorum disk

2. Database group Virtual IP and Name - Database disk for both SID's

3. SAP SID 1 -Virtual IP and Name - SAP USR folder on MSCS - SID1

4. SAP SID 2 - Virtual IP and Name - SAP USR folder on MSCS- SID 2
In this case you can use the both cluster nodes effectively.

Regards

Sriram

[tamil_arasan · Accepted solution]

Hi Sriram,

Thank you very much for your input. we need one more information. In our landscape, we are going to install APO and TM systems in one MS failover cluster. Node 'A' will have APO application and node 'B' will have APO DB. node 'B' will have SAP TM application and node 'A' will have SAP TM DB.

could you please let us know pros and cons in the above scenario?

Thanks a lot.

Pradeep

[Sriram2009 · Accepted solution]

Hi Pradeep

You can have APO system on Node A & TM system on Node B (both Nodes SAP instance you should be on, both Cluster nodes acts as active / active mode), For DI(For Both systems) In which physical Cluster Node is having very low load you can move the Failover resource(DI) to that node.

  In my environment we have SAP PI & Portal systems are configuration in failover cluster. One node holding PI and another node holding EP & DB.  because EP load is less.

Regards

SS

[tamil_arasan · Accepted solution]

Thanks a lot Sriram

[former_member188883]

Hi Pradeep,

From my point of view, It won't be a good choice to have 2 SAP systems using the same Microsoft Failover Cluster. The reasons which I feel are

1) In case of failover both the SAP systems shall failover resulting in to downtime for 2 SAP systems instead of 1.

2) I am not sure whether it is possible for use the same PRD cluster service for configuration on 2 SAP systems. Please raise this to SAP OSS and confirm.

Regards,

Deepak Kori

[tamil_arasan]

Thanks a lot Deepak,

Yes it is possible to install two SAP on one MS failover cluster. we got the details from installation guide. thanks a lot for your help.

Regards,

Pradeep