RE: 64 node Oracle RAC Cluster (The reality of...)
- From: "Ken Naim" <kennaim@xxxxxxxxx>
- To: "'Mladen Gogala'" <gogala@xxxxxxxxxxxxx>
- Date: Thu, 23 Jun 2005 00:44:34 -0500
I agree 100%. I don't recommend any software until it is reliable. I am
expecting (hoping) that in the future ASM will be as reliable as the other
products you mentioned, even they were new at some point in time.
Ken Naim
Oracle DBA and Developer
-----Original Message-----
From: Mladen Gogala [mailto:gogala@xxxxxxxxxxxxx]
Sent: Wednesday, June 22, 2005 11:56 PM
To: kennaim@xxxxxxxxx
Cc: kevinc@xxxxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Subject: Re: 64 node Oracle RAC Cluster (The reality of...)
On 06/23/2005 12:27:48 AM, Ken Naim wrote:
> I haven't worked with ASM so I cannot comment on whether to use it or
> not however a couple reasons to use it could be cost and support.
> AFAIK there is no extra charge for ASM and Veritas is very expensive
> for any/all of their products. As for support it is better to talk one
> set of support staff instead of 2 pointing fingers at each other
> without having to pay extra for VOS support.
There is an old saying that you get what you pay for. Reliability of the
company's database is not the main thing to save money at. You can have New
Year with Heineken instead of Dom Perignon and that's perfectly alright.
Saving money on reliability is not alright. ASM is an LVM. The common wisdom
dictates not to use it until it becomes reliable. Think about it this way:
if your ASM storage becomes corrupt (has happened), your database will be
corrupt as well and you will have to restore it from backup (it must be
RMAN, because nothing else works with ASM) and recover it. During that time
your database will be inaccessible to its users and your CIO will have
plenty of time to think about you and your advice. It is very likely that
you will have to exercise your resume-writing skills as soon as the database
is back on-line. Your professional reputation may suffer from the fact that
your database was down for hours and that is not a good thing. I'd rather go
with something like OCFS or GFS or UFS (SUN) then with ASM. Even raw devices
are very reliable, if somewhat cumbersome. Oracle Support is a great
psychological help if you don't have at least silver support. They'll gladly
pray for you.
--
Mladen Gogala
Oracle DBA
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