Re: availability of SATA vendors - Mailing list pgsql-performance

Hi Luke,

I forgot about that article, thanks for that link. That's indeed a nice
overview of (in august) recent controllers. The Areca 1280 in that test
(and the results I linked to earlier) is a pre-production model, so it
might actually perform even better than in that test.

We've been getting samples from AMCC in the past, so a 96xx should be
possible. I've pointed it out to the author of the previous
raid-articles. Thanks for pointing that out to me.

Best regards,

Arjen

On 22-11-2006 22:47 Luke Lonergan wrote:
> 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?
>>>
>
>
>
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