Re: Multiple DATABASES on the same RAC cluster

Hi from Paris

just as on a standalon machine, number of Oracle instances running on a hardware is limited by ... the hardware !!!

but it is true that 9i cache fusion feature really helped thing, by using heartbeat link instead of disks in order to serialize nodes...

On your 2 question, rolling upgrades is not a supported option with Oracle RDBMS at this time (which mean, you cannot patch only one node of a cluster, whitout patching both)

A last, how can you say you are sure of the heartbeat ?? As a consultant, I can say no true informations are really known about real bandwith utilization by 9i RAC on the inter-connect.

just have a try !!! for real things, do benchs !!!

"Mark J. Kounalis" <mkounal_at_hotmail.com> a écrit dans le message de news:vc8911kcu91h6c_at_corp.supernews.com...
> Hello everyone:
>
> I got asked this question from a client the other day and I am having a
hard
> time finding out a good answer to relay to them. They want to know wether
> or not they can implement two or more RAC clustered databases on the same
> hardware running at the same time. They would like to consolidate their
> databases onto one computer cluster and they have limitations by some of
> their software vendors which dictate the exact version and patch level
they
> can run to be supported. Additionally they have in-house stuff that they
> might want to run on a newer version or with a more recent patch set. I
> have personally never tried this and am trying to put together some
machines
> to try this - but I thought that maybee someout out there might have tried
> this already. They are planning on running on Redhat's 2.1AS Linux
> operating system on two to three dual 2.4ghz Xeon HP/Compaq machines. I
am
> fairly sure that sharing the interconnect (which is really just a private
> network) would be ok - but I have no idea about the dependancies of the
OSD
> stuff if they want to in fact run different versions of the database in
RAC
> mode on the same hardware. Any thoughts would be greatly appreciated.
> Thanks!
>
> Mark J. Kounalis
>
>
Received on Sat May 17 2003 - 18:47:15 CDT