RE: Hardware Architecture.. please advise
- From: "WEBBER, VALERIE" <Vwebber@xxxxxxxxxxx>
- To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 8 Mar 2004 09:56:58 -0600
That's what I was afraid of. I'm glad I asked! Thanks!
-----Original Message-----
From: Mladen Gogala [mailto:mladen@xxxxxxxxxxxxxxx]
Sent: Monday, March 08, 2004 10:46 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: Hardware Architecture.. please advise
On 03/08/2004 10:13:44 AM, "WEBBER, VALERIE" wrote:
> So there aren't any drawbacks to having the apps server and the database
> running on the same box? Is this in line with the new grid computing? I'll
> start out with Oracle9i for the database and 10g on the Apps server. I
just
> want to make sure before I tell them to do it.
Well, if they're on the same physical box, that means that they're using the
same I/O bandwidth,
bumping into each other inadvertently. That is in complete accord with the
principles of the
gridlock computing. Even more, it's extremely hard to diagnose, because you
don't see the
activity caused by the "other server" on your monitors like sar or iostat.
You will simply
start waiting for the I/O. It will be even more beautiful, if the waits are
because of
the I/O channel capacity, which can happen for SCSI channels. So, you are
not hitting the same
disk, you are not on the same server, but the bottleneck is the SCSI adapter
itself. Unless
you can guarantee the I/O system performance, I'd advise against that. It
would be like
counting on speed of about 70 mph on LIE on Monday morning, just because
it's a huge highway.
Things might not work quite as you expect them to.
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