Original message ----------------------
From: "Baumgartel, Paul" <paul.baumgartel_at_credit-suisse.com>
> 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_at_credit-suisse.com
> www.credit-suisse.com
>
>
>
> ________________________________
>
> From: oracle-l-bounce_at_freelists.org
> [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Michael McMullen
> Sent: Thursday, September 13, 2007 10:45 AM
> To: ryan_gaffuri_at_comcast.net; oracle-l_at_freelists.org
> 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
>
> ==============================================================================
> Please access the attached hyperlink for an important electronic communications
> disclaimer:
>
> http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html
> ==============================================================================
>
attached mail follows:
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@credit-suisse.com
www.credit-suisse.com
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
==============================================================================
Please access the attached hyperlink for an important electronic communications disclaimer:
http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html
==============================================================================
