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Former Member
Mar 20, 2008 at 09:03 AM

HA in Windows + SQL Server - in NW 7.0

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Hi all,

I have to install an ABAP-only SAP ERP 2005 system using High Availability in Windows 2003 + SQL Server 2005 for my customer.

There's no way else except using MSCS so SAP can support me in case of problem?

After reading SAP installation guide (ERP 2005 SR2 ABAP on Windows SQL Server), I find 2 one-cluster options:

- Option 1:

+ Machine 1: 1st MSCS node: ASCS, DB instance, and CI.

+ Machine 2: Additional MSCS node: ASCS, DB instance, and DI.

- Option 2:

+ Machine 1: 1st MSCS node: ASCS, DB instance.

+ Machine 2: Additional MSCS node: ASCS, DB instance

+ Machine 3: 1 CI node.

+ Machine 4: 1 or more Dialog instance.

Unfortunately, the installation guide says that CI is a non-SPOF and my customer wants a MSCS with full clustered so the CI have to be clustered also. Customer also wants to use 3 machines only, they don't want to use 4 machines to save cost.

At first thougth, I think the infrastructure is:

- Machine 1: 1st MSCS node: ASCS, DB instance

- Machine 2: 1 CI node

- Machine 3: additional MSCS node: ASCS, DB instance, and CI.

Machine 1 & machine 2 make the primary application server instance, machine 3 is for case of failover.

I don't know my infrastructure is right or not with 2 CIs. What I want is to make a full clustered solution with 3 machines.

Someone with experience please help me.

Thanks a lots,

Toan Do