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RE: San Performance gurus

From: Sarnowski, Chris <>
Date: Wed, 23 Apr 2003 08:37:07 -0800
Message-ID: <>

I'm not sure I understand the question (but I'm not a SAN guru either). We run our database on a SAN, and we also use SAME (more or less; see below). The two concepts aren't necessarily related (though I'd guess it's easier to use SAME on a SAN rather than otherwise).

We're running RAID 5 without apparent ill effects. We spend a lot more time reading than writing. We're also in a situation (shared by many others, I understand) where tuning a query can have a dramatic effect on performance, and I/O tweaks are pretty ho-hum by comparison.

Maybe I'm misusing the acronym SAME - I've always used it somewhat casually - that is, I assume that building across several RAID-5 sets, rather than across RAID 1 or 10 or 0+1, gives an acceptable amount of protection against hardware failure. The one thing I've fought for is to have a separate volume, on top of physically separate disks, for multiplexing of redo and control files.


> -----Original Message-----
> From: Spears, Brian []
> Sent: Tuesday, April 22, 2003 7:12 PM
> To: Multiple recipients of list ORACLE-L
> Subject: San Performance gurus
> Has anybody any knowledge on the San configuration as compared to
> ORACLE's SAME methodology.
> I am ok with the San raid 5 but some are saying ORACLES SAME
> makes alot of
> difference. SAME=Stripe and Mirror Everything.
> I did some performance testing and found the payback was not
> worth it. My
> conclusion
> was the advance technology just does a good job on
> performance on the SAN's.
> I could never really even reproduce hot spots that were bottlenecks.
> Brian

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Author: Sarnowski, Chris

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Received on Wed Apr 23 2003 - 11:37:07 CDT

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