Date: Wed, 31 Jan 2007 01:21:06 -0500 From: Robert Huff <roberthuff@rcn.com> To: freebsd-current@freebsd.org Subject: Re: Interesting speed benchmarks Message-ID: <17856.13650.964464.554063@jerusalem.litteratus.org> In-Reply-To: <E1HC8QK-0000Px-P5@hetzner.co.za> References: <peterjeremy@optushome.com.au> <20070130231210.GR892@turion.vk2pj.dyndns.org> <E1HC8QK-0000Px-P5@hetzner.co.za>
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Ian FREISLICH writes: > > > DUMP: finished in 12961 seconds, throughput 2095 KBytes/sec > > 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. In supplemental testing (advised by Peter Jeremy) the disk has been able to transfer(read) 25 mbytes/sec - sufficient to declare it not the bottleneck. Additional testing will happen, but dump is by far the prime suspect. > Last time I looked, ahc(4) was still under GIANT. I noticed that. Is there any sentiment for pulling it free? And how much would that help? Robert Huff
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