Multiple GI Homes and multiple ASM instances on the same server

Tobba

Hi there,

I am facing a customer request in which he wants to have, on the same server, two Grid Infrastructure installations, each with its own ASM instance.

I cannot find anywhere some "official" statement about this. I mean, I know that it's possible, but not recommended. Has anyone had to deal with such thing? What about the support on this case?

Thanks!

Regards,

Bogdan

Andris Perkons-Oracle

The only way to have multiple Grid Infra installations on the same server is by having some kind of virtualization. Otherwise - not possible.

Andris

Tobba

Thanks, Andris! In our case, it's a physical server, with 2 DBs (one prod, one dev) sharing the same ASM instance. And they want to split them. I know that multiple ASM instances are possible within the same GI home, but we would need separate homes, because any ASM patching for dev (for example) would require downtime for prod also.

Is there any oracle documentation in which it is said that this is not possible, like you said above?

Many thanks again!

Regards,

Bogdan

Andris Perkons-Oracle

Please show me the documentation that it is possible to have multiple ASM instances on the same server.

The best separation you can achieve on a server is to have separate ASM diskgroups for each database. But still, only one ASM instance per server.

Gavin404

Maybe you could use different grid owner、different asm sid and different asm_diskstring.

Sunny kichloo

If for two ASM instance customer will have two different database it is better if you go with Single Instance ASM handling two different databases.

It would be better for manageability purpose.

Tobba

But he has two different dbs using the same ASM instance That's the problem. Because one db is test, and the other is prod. And - let's take for example the case when we have to apply latest PSU to the test db => we have to apply it also on the Grid <=> we have to stop all the services => stop ASM instance => downtime for the prod db !!!

User_0U44J

In the initial RAC (9i/10g) documentation. it is said that one server can have one ASM instance to support all instances. Same only one Grid/CRS can be installed on the sever. That grid version should be => rdbms version.