RE: Question re single instance RAC node

Bill,

There is no reason I can think of that your plan would not work.  You
certainly can have a non-Rac instance on the RAC cluster.  You simply
are not protecting this database with the RAC features.

I also would consider using the ASM software for your mount points for
this database.  You do not have to do this - you could have separate
mount points that are traditional directory structures on the server and
put your database on those disk.  For me, I would rather be consistent
on a server and have everything using disk the same way - but that's
just me.

Just another thought about this database not being supported by RAC - if
it were me, I would make it available via RAC on both instances.  What
will happen in the future is that the server that this machine is on
will go down for some reason, and then this database will not be
available.  You will then have conversations with someone about "why the
other database is still up and this one isn't".

Enabling RAC for this database will make you a hero at some point, and
will only cost you some initial setup cost (time).  You don't need to
have the instance up and running on the second node all the time - just
test it occasionally to make sure it works.

Hope this helps.

Tom


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-----Original Message-----

From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of William Wagman
Sent: Monday, December 18, 2006 8:20 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: Question re single instance RAC node

Greetings,

I'm new to this list and am hoping there are some folks with RAC
experience. We running 10gR2 and are going to be implementing ASO in
order to use TDA to encrypt sensitive data. We have a second database
which also contains data which must be encrypted and in an attempt to
save licensing costs would like to put it on one of the nodes in the RAC
cluster. This raises a number of questions in my mind which I'm hoping
someone can shed some light on.

First, does the single instance database have to be a RAC database? I
have heard people making reference to a single node RAC instance and
must admit it doesn't make complete sense to me.

Secondly, if we are using ASM for the RAC instances is there any problem
with putting the database files for the non-RAC database on a file
system?

Finally, does anyone have any thoughts on the pros and cons of setting
up oracle like this. A single instance database on one node of a RAC
cluster. 

I appreciate any input folks might have.

Thanks.

Bill Wagman
Univ. of California at Davis
IET Campus Data Center
wjwagman@xxxxxxxxxxx
(530) 754-6208
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