Re: More than one RAC instance/database on the same machine ?

First, thank you for your answers.

For us, the point is availability (and not scalability).

Say we have two databases A and B and two machines. We put A and B in RAC configuration :
- instance A1 and B1 on machine 1
- instance A2 and B2 on machine 2
(A1 and A2 for database A, B1 and B2 for database B)

If the machine 1 crashes, then all the work being done by A1 and B1 failover to machine 2 (TAF) and everything is very fast ... and transparent.

Does it make sense ?
Thanks (i'm rather new to this)

DA Morgan <damorgan_at_x.washington.edu> wrote in message news:<1099101941.420573_at_yasure>...
> Le JeanMimi wrote:
>
> > Hello,
> >
> > Is it possible to run more than one RAC instance on the same machine ?
> > (to be exact : more than one RAC instance on the same IBM P690 machine
> > partition - AIX 5.2) ?
> >
> > (we hope so ;)
> >
> > For instance :
> >
> > Machine Partition 1
> > instance "A1" for the database "A"
> > instance "B1" for the database "B"
> > instance "C1" for the database "C"
> >
> > Machine Partition 2
> > instance "A2" for the database "A"
> > instance "B2" for the database "B"
> > instance "C2" for the database "C"
> >
> > Same software version for all db.
> > Btw is it necessary to have separate interconnect sets or can all the
> > databases share the same interconnect ?
> >
> > Thanks in advance
> >
> > JM
>
> Possible yes. Reasonable is another question. The point of RAC is
> high availability and scalability. Two instances on the same machine
> gives you neither. In fact it decreases both. So what is it that you
> are trying to accomplish?
>
> I believe you would need separate interconnects but I've never tried
> it as it just seems totally counter-productive.
Received on Sat Oct 30 2004 - 15:12:57 CDT