Fwd: Hard Disk selections
- From: Denys van Kempen <dvkempen@xxxxxxxxx>
- To: Oracle-L@xxxxxxxxxxxxx
- Date: Thu, 22 Sep 2005 14:11:54 +0200
---------- Forwarded message ----------
From: Denys van Kempen <dvkempen@xxxxxxxxx>
Date: Sep 22, 2005 2:11 PM
Subject: Re: Hard Disk selections
To: bunjibry@xxxxxxxxx
Bryan,
Read
http://www.oracle.com/technology/deploy/performance/pdf/opt_storage_conf.pdffor
an introduction to the topic. It explains quite well the problem with
disks getting bigger (more data) but not getting much faster (I/O
throughput). The HP/Oracle whitepaper
http://www.oracle.com/technology/deploy/availability/pdf/SAME_HP_WP_112002.pdfgives
some return from the field.
Oracle uses 42 * 36GB disks for an Oracle Applications standard benchmark on
the IBM FastT
http://www.oracle.com/apps_benchmark/html/0440A_Report1.html
Ever wondered why the number 1 TPC benchmark configuration uses 6400 (36.4GB)
disks?
http://www.tpc.org/tpcc/results/tpcc_perf_results.asp
Select System link and then Executive Summary for system configuration. Some
examples:
http://www.tpc.org/results/individual_results/IBM/IBM_595_64_20041118_ES.pdf
http://www.tpc.org/results/individual_results/HP/HP%20Integrity%20rx5670%20Cluster%2064P_ES.pdf
Regards,
Denys
On 9/22/05, Bryan Wells <bunjibry@xxxxxxxxx> wrote:
>
> Let me apologize in advance if i leave any good facts out and have to
> restate...
> I am in process of migrating an existing windows 2k,
> 9.2.0.5<http://9.2.0.5>test environment to some beefier hardware attached to
> IBM FastT SAN (?). The
> current environment is a Dell Poweredge 6400 p3 4x500 MHz/ with internal and
> external disk being 76GB 15k RAID 5. The new environment will be a blade
> with 2x2.5Ghz, at least, attached to the san. My question; will
> performance, Oracle that is, suffer going with a bigger disk (146Gb) on the
> SAN, or should I stay with the 76GB disk? The requirement is to not allow
> the performance to degrade below the existing SLA, however, we will have
> more users hitting this test instance once the cut over has been made.
> Because the hardware will not be over 4+ years old, my gut feel is that the
> bigger disk should not be an issue in this type of environment any more than
> that seen with the 76Gb in the existing environment, however, how do I prove
> this?
> Any links to help Green DBA Man understand Oracle and disk selections?
> As always, thanks for your help and patience.
>
> --
> Bryan Wells
> bunjibry@xxxxxxxxx
> Oracle DBA hopeful
>
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