Multiple Oracle databases on Single host

Hi Gurus,
I am new to SAP World. We are planning to install multiple SAP systems (ECC/BW/SRM/XI) on a single host with Oracle 11.2.0.2. As per SAP instguide, the Oracle RDBMS software should be owned by ora<SID>:dba. So we are planning to install the oracle software for the first dev system ERD under 'oraerd:dba' id. And the next will be under 'orabwd:dba' and the third under 'orasrd:dba'.
My questions is, instead of having multiple ORACLE_HOME's owned by individual id's, can I have one consolidated Oracle_Home owned by 'oracle:dba' which then controls all the oracle db's and its datafiles.
I know there is a SAP Note to do this for Oracle RAC (prd is being planned this way), but can we do the same for Single instance also.
Best Regards
Shiv

Shivaspo wrote:
Hi Orkun,
> Thanks for your reply. Its a must or its just better to have under individual O_H. The reason we were looking to out all under 'oracle' was that our DR site for the prod is going to be single instance physical standby using DG. SAP recommends to have the OS user on the DR host to be oracle, so that there are no issues with permissios for log shipping.
> So we will end up having multiple db's system running under 'oracl' on the DR site.
>
> -Shiv
Hi Shiv,
Technically, there's no restriction to configure your system, by this way. But from SAP point of view; at the first step, because the the installation is not completed as referred by SAP installation guide, you will not able to get support by SAP. For the instance, if you face with a problem during the productive, SAP may not support your installation.
Secondly, you may face with the problems at the database upgrades and applying patches. For example, you need to stop all the databases when you decided to patch one of them.
I can count many restrictions about this issue. As a summary, from technical way, it is possible to have one Oracle home, but it is strongly recommended to have different Oracle home folders for each Oracle installation.
Best regards,
Orkun Gedik

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