Can we have multi-Home CRS/ASM on same server?

Hi All,
I'm studying the feasibility for below situation (sorry i'm new in RAC)
I'm not sure whether it can setup in HP-UX-11.23 Itanium box or not (Not OpenVMS)
We have two node e.g. node1 and node2 in RAC environment.
In node1, we plan to create one instance for each customer (Let say 10 customer, we will create 10 instances on same server).
For each instances (ORACLE_HOME), can we have their own ASM software (ASM instance) and CRS software (CRS HOME) instead of create one and share with all instances.
We're looking for multi-home concept, so that if one of our customer want to upgrade/patches oracle, it will NOT affect other customer.
Any idea, or any website can share with me?
Thanks in advance.
Best Regards,
klnghau
Edited by: klnghau on Oct 15, 2010 8:51 AM

Let say, we have 10 instances in one box, each database will have their RDBMS homes, if we can not have multiple ASM instances or CRS home.
Whenever we want to apply patches on one of the instances, definitely other instances will be affected.
Just want to know what is the best deploy/best practice to apply patches in such environment?I think the first 'best' practice is to not have multiple instances on a single server. But if you have to do it, I'd say virtualisation might help you so that each instance lives in it's own virtual machine with it's own operating system. That way, you can also patch the OS and reboot it and only affect a single database instance. The only problem with RAC might be that not all virtualization platforms are supported with RAC
Bjoern

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