Date: Fri, 18 Jul 2003 14:56:17 -0700 From: Pedram Nimreezi <Support@Netflag.Net> To: Trent George <soundsampler@sbcglobal.net>, sos@freebsd.org Cc: freebsd-performance@freebsd.org Subject: Re: promise sx4000 card & tx4000 results over 170mb/s sustained read Message-ID: <5.2.0.9.2.20030718145601.0243b7a0@pop.dc3.adelphia.net> In-Reply-To: <20030718040044.96606.qmail@web80006.mail.yahoo.com>
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I have a raid10 configuration with 4 western digital 8mb cache 120gig hard drives using a 2400a controller from adaptec on a dual 2400 xeon with 2 gigs ECC ram I'm doing the same tests... I'm getting 33mb/s. I got the controller because I figured it would be better to use a hardware solution... Does all this sound right? I should be getting much better results shouldn't I? After striping and mirroing i get 220 gigs free and from a report I read this configuration gets better performance from the 2400A http://www.xbitlabs.com/articles/storage/display/adaptec-2400a.html At 09:00 PM 7/17/2003 -0700, Trent George wrote: >Hi Soren, > >I wanted to congratulate you on fantastic results in performance on a >tx4000 card. > >I have a dual amd mb with 66mhz support slot. 4 western digital drives >(180gb each) > >I have clocked sustained 176mb/s read from this raid0 array and 120+mb/s write > >writes seemed cpu bound ? (50% idle from second processor) >reads 56% idle (first process close to maxed out) > >there were several tricks to getting this performance, custom kernel compile > >1/ MAXPHYS=256k >2/ MAXBSIZE=256k >3/ atacontrol create RAID0 128 /dev/ad4 /dev/ad6 /dev/ad8 /dev/ad10 >4/ newfs -U bs=262144 /dev/ar0 > >this allowed 64kb stripe size to use 4 drives on each "block" parallel reading > >i used iostat to monitor processor and transfer rate using following commands > >dd of=test.dat if=/dev/zero bs=64k count=20000 >dd if=test.dat of=/dev/null bs=64k > >Question #2 > >I purchased a sx4000 card in the hope to increase speed :-) >I noticed that PDC20621 is not in ata-chipset.c yet >The card is not recognised on boot ether. > >Is there anything I can do or provide to help you add support for this card ? > >Question #3 > >Is there any plans to support intel SATA raid support on ICH5R (i865/i875) >for boot up (sort of like promise and highpoint) > >I have been experimenting with gigabit ethernet and sustained 100mb/s >samba read/write performance, and seem to be making good progress. > >also experimenting on huge writeback cache (400mb+) up from 1mb >vfs.hirunningspace >seems to help with impressive burst network transfer speed. > > >Thanks > >Trent George > > >PS I don't know if you remember but I sent an amd system to you a long >time ago to help add support for highpoint chipsets, I appreciate all your >great work. > >_______________________________________________ >freebsd-performance@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-performance >To unsubscribe, send any mail to >"freebsd-performance-unsubscribe@freebsd.org"
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