Hi Michael:
It seems several questions are mixxed together here. I try to answer what I can ascertain, let me know if I misunderstood anything:
Q: "Can a custom application run "on" the same SAP HANA system with a BW system?" A: Yes, see note 1661202, which provides the whitelist of applications that can run on the same SAP HANA system. The whitelist includes "custom applications".
Q: What if the other application is built on SAP NW AS ABAP? And I already have an SAP NW AS ABAP for BW? Can both SAP NW AS ABAP systems be deployed with one SAP HANA system as their single DB? A: Yes. Keep in mind that the default configuration is that each NW AS ABAP-based system is deployed as a Central Instance and application servers on seperate hardware servers than the SAP HANA hardware. Those SAP NW AS ABAP systems connect remotely to the SAP HANA DB.
Q: Can I run more than one SAP BW system on the same SAP HANA DB? A: I think this was already answered, which is "no" presently for production systems, but is supported for non-production systems; see note 1666670.
A few things to keep in mind:
Please see the "further considerations" section of note 1661202. Of particular importance is sizing. Utilize an additive sizing approach, where you figure out a good sizing estimation for each application or scenario, then add those together to determine the total sizing requirements. Don't underestimate and work with the hardware partner on any sizing estimations.
As of the beginning of the year, SAP began supporting the deployment of SAP NW AS ABAP application server directly on the SAP HANA system hardware. So far, support for one CI (Central Instance) and possibly additional app servers for the same system is provided, but not more than one CI (different AS ABAP systems). See Announcement: SAP HANA and SAP NetWeaver AS ABAP Deployed on one Server is generally available
With SPS09 (planned for Nov later this year), we plan to introduce a feature called "multiple databases" which will provide greater flexibility to deploy more than one application or scenario on the same SAP HANA DBMS, each with its own "tenant DB." Thus, in future we should expect to more readily support scenarios like more than one BW system running "on"the same SAP HANA system hardware.
Best Regards -
Ron Silberstein
SAP HANA Product Management
