User-Agent: Microsoft-Entourage/11.2.5.060620
Date: Wed, 22 Nov 2006 15:47:56 -0600
Subject: Re: availability of SATA vendors
From: "Luke Lonergan" <llonergan@greenplum.com>
To: "Arjen van der Meijden" <acmmailing@tweakers.net>,
	"Jeff Frost" <jeff@frostconsultingllc.com>
cc: "Bucky Jordan" <bjordan@lumeta.com>,
 "Joshua Drake" <jd@commandprompt.com>,
	pgsql-performance@postgresql.org
Message-ID: <C18A21AC.E512%llonergan@greenplum.com>
Thread-Topic: [PERFORM] availability of SATA vendors
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In-Reply-To: <456483C5.1060804@tweakers.net>
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Arjen,

As usual, your articles are excellent!

Your results show again that the 3Ware 9550SX is really poor at random I/O
with RAID5 and all of the Arecas are really good.  3Ware/AMCC have designed
the 96xx to do much better for RAID5, but I've not seen results - can you
get a card and test it?

We now run the 3Ware controllers in RAID10 with 8 disks each and they have
been excellent.  Here (on your site) are results that bear this out:
  http://tweakers.net/reviews/639/9

- Luke


On 11/22/06 11:07 AM, "Arjen van der Meijden" <acmmailing@tweakers.net>
wrote:

> Jeff,
> 
> You can find some (Dutch) results here on our website:
> http://tweakers.net/reviews/647/5
> 
> You'll find the AMCC/3ware 9550SX-12 with up to 12 disks, Areca 1280 and
> 1160 with up to 14 disks and a Promise and LSI sata-raid controller with
> each up to 8 disks. Btw, that Dell Perc5 (sas) is afaik not the same
> card as the LSI MegaRAID SATA 300-8X, but I have no idea whether they
> share the same controllerchip.
> In most of the graphs you also see a Areca 1160 with 1GB in stead of its
> default 256MB. Hover over the labels to see only that specific line,
> that makes the graphs quite readable.
> 
> You'll also see a Dell Perc5/e in the results, but that was done using
> Fujitsu SAS 15k rpm drives, not the WD Raptor 10k rpm's
> 
> If you dive deeper in our (still Dutch) "benchmark database" you may
> find some results of several disk-configurations on several controllers
> in various storage related tests, like here:
> http://tweakers.net/benchdb/test/193
> 
> If you want to filter some results, look for "Resultaatfilter &
> tabelgenerator" and press on the "Toon filteropties"-tekst. I think
> you'll be able to understand the selection-overview there, even if you
> don't understand Dutch ;)
> "Filter resultaten" below means the same as in English (filter [the]
> results)
> 
> Best regards,
> 
> Arjen
> 
> On 22-11-2006 17:36 Jeff Frost wrote:
>> On Wed, 22 Nov 2006, Bucky Jordan wrote:
>> 
>>> Dells (at least the 1950 and 2950) come with the Perc5, which is
>>> basically just the LSI MegaRAID. The units I have come with a 256MB BBU,
>>> I'm not sure if it's upgradeable, but it looks like a standard DIMM in
>>> there...
>>> 
>>> I posted some dd and bonnie++ benchmarks of a 6-disk setup a while back
>>> on a 2950, so you might search the archive for those numbers if you're
>>> interested- you should be able to get the same or better from a
>>> similarly equipped LSI setup. I don't recall if I posted pgbench
>>> numbers, but I can if that's of interest.
>> 
>> I could only find the 6 disk RAID5 numbers in the archives that were run
>> with bonnie++1.03.  Have you run the RAID10 tests since?  Did you settle
>> on 6 disk RAID5 or 2xRAID1 + 4XRAID10?
>> 
>