RE: ASM IO distribution on a SAN
- From: "Baumgartel, Paul" <paul.baumgartel@xxxxxxxxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Thu, 13 Sep 2007 11:42:29 -0400
I agree. What many people don't realize is that ASM was meant by Oracle
to allow small- and medium-size shops, who didn't want to shell out the
bucks for a storage system like Symmetrix, to realize the benefits of
striping and mirroring. Running ASM on top of RAID gives you stripes on
stripes (or what some people call "plaiding"-ugh).
Having said all that, we run ASM on top of Symmetrix, as it's the
standard tier one storage. There are *some* benefits, such as automatic
rebalancing, but to my mind it's gilding the lily.
Paul Baumgartel
CREDIT SUISSE
Information Technology
Securities Processing Databases Americas
One Madison Avenue
New York, NY 10010
USA
Phone 212.538.1143
paul.baumgartel@xxxxxxxxxxxxxxxxx
www.credit-suisse.com
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Michael McMullen
Sent: Thursday, September 13, 2007 10:45 AM
To: ryan_gaffuri@xxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Subject: Re: ASM IO distribution on a SAN
Doesn't this all seem like overkill? It doesn't sound like you are
getting RAW disks. The san guys would be using some form of raid already
wouldn't they? They've packaged up the disks, made luns for you, do you
really want another layer on top to troubleshoot?
I don't think ASM will increase your performance beyond was a good SAN
admin could do for you.
Mike
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