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@xxxxxxxxxxxx> 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? >> >
