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Re: partitioning in an NAS or SAN environment

From: Mladen Gogala <mladen_at_wangtrading.com>
Date: Thu, 06 Nov 2003 12:09:24 -0800
Message-ID: <F001.005D5DAA.20031106120924@fatcity.com>


To paraphrase Pythia, an early leader on the DSS market, my advice would be"

"Partition not create monolythic".

Partitioning is done for performance reasons, that much is clear. To really answer your question in any other way then speaking quixotically on laurel (SQL for short), I'd need to know the structure of your NAS device. If, for instance, your NAS device is one huge, monolythic RAID-5 device, then you don't benefit from spreading things over several mount points. In other words, mount points are here only for the ease of administration. You can still benefit from partitioning, because god partitioning will help you with partition elimination. In other words, optimizer will automatically discard partitions that are not needed from your access path and you'll have to do lot less reading. If, on the other hand, your NAS partitions have different network paths and you'd use eth0 for /data1 and eth1 for /data2, then the situation is not so simple and you'd have to take into account the usage of both network paths, their capacity and reliability and work with your SA and network analyst.

On 11/06/2003 01:54:26 PM, ryan_oracle_at_cox.net wrote:
> most of the oracle docs state that when you partition a table you will get the most performance benefits by splitting the datafiles for each partition onto seperate storage devices.
>
> Im on an NAS and all I see are logical mount points. What are your recommendations for this?
>
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Mladen Gogala
Oracle DBA

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Author: Mladen Gogala
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Received on Thu Nov 06 2003 - 14:09:24 CST

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