Date: Fri, 02 Feb 2007 16:32:18 +1300 From: Mark Kirkwood <markir@paradise.net.nz> To: Peter Jeremy <peterjeremy@optushome.com.au> Cc: Ian FREISLICH <if@hetzner.co.za>, Robert Huff <roberthuff@rcn.com>, freebsd-current@freebsd.org Subject: Re: Interesting speed benchmarks Message-ID: <45C2B0C2.3090707@paradise.net.nz> In-Reply-To: <20070201183356.GE909@turion.vk2pj.dyndns.org> References: <peterjeremy@optushome.com.au> <20070130231210.GR892@turion.vk2pj.dyndns.org> <E1HC8QK-0000Px-P5@hetzner.co.za> <20070201183356.GE909@turion.vk2pj.dyndns.org>
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Peter Jeremy wrote: > On Wed, 2007-Jan-31 07:54:24 +0200, Ian FREISLICH wrote: >> As a random datapoint that might or might not be related. In the >> last year or so I was pontificating about how much better SCSI was >> that IDE/ATA to my boss. I then did some benchmarks on my (CURRENT) >> system and discovered that an old 10Gig 7.5krpm UDMA33 disk >> significantly out perform some Seagate Cheatah LVD 10krpm disks. > > I have access to a Sun V20z at work: > mpt0: <LSILogic 1030 Ultra4 Adapter> port 0x2000-0x20ff mem 0xfe850000-0xfe85ffff,0xfe840000-0xfe84ffff irq 27 at device 4.0 on pci2 > mpt0: [GIANT-LOCKED] > mpt0: MPI Version=1.2.15.0 > mpt0: Capabilities: ( RAID-1E RAID-1 SAFTE ) > mpt0: 0 Active Volumes (1 Max) > mpt0: 0 Hidden Drive Members (6 Max) > da0 at mpt0 bus 0 target 0 lun 0 > da0: <FUJITSU MAW3073NC 0103> Fixed Direct Access SCSI-3 device > da0: 320.000MB/s transfers (160.000MHz, offset 127, 16bit), Tagged Queueing Enabled > da0: 70136MB (143638992 512 byte sectors: 255H 63S/T 8941C) > da1 at mpt0 bus 0 target 1 lun 0 > da1: <FUJITSU MAW3073NC 0103> Fixed Direct Access SCSI-3 device > da1: 320.000MB/s transfers (160.000MHz, offset 127, 16bit), Tagged Queueing Enabled > da1: 70136MB (143638992 512 byte sectors: 255H 63S/T 8941C) > > Whilst the drives are geom mirrored, running in "prefer" mode forces > all reads to come off the first drive (iostat/systat verify this) and > I get: > # df -ki /home > Filesystem 1K-blocks Used Avail Capacity iused ifree %iused Mounted on > /dev/mirror/gm0s1f 38999124 13440472 22438724 37% 273895 4766231 5% /home > # dump -0aL -f /dev/null -C 32 /home > DUMP: DUMP: 13671011 tape blocks on 1 volume > DUMP: finished in 906 seconds, throughput 15089 KBytes/sec > > Note that I've only just mirrored this system that everything has been > very recently restored which might give an optimistic result but this > is still way above what I'm seeing on my ATA system at home or what > Robert is seeing. > Not sure if this will be helpful or not, but on a 4xATA-133 disk 3ware RAID 0 system (running STABLE) I get this: # dump -0aL -f /dev/null -C 32 /home DUMP: DUMP: 12704177 tape blocks on 1 volume DUMP: finished in 628 seconds, throughput 20229 KBytes/sec While the dump is happening iostat shows: device r/s w/s kr/s kw/s wait svc_t %b twed0 1113.2 0.2 71230.9 6.4 2 1.6 86 So looks like we are working the filesystem pretty hard... Cheers Mark
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