Date: Sat, 06 Nov 1999 12:49:34 +0100 From: sthaug@nethelp.no To: rsnow@lgc.com Cc: gurney_j@resnet.uoregon.edu, freebsd-questions@freebsd.org Subject: Re: writing much slower than reading... Message-ID: <89944.941888974@verdi.nethelp.no> In-Reply-To: Your message of "Sat, 06 Nov 1999 05:10:56 -0600" References: <38240CC0.8099D19D@lgc.com>
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> Emm, I want your system. Have you double checked your numbers? They > look a bit high. Here's what I get on a vinum stripe across two 'cudas > on an SMP box: > > rsnow@basil% time dd if=/dev/vinum/rstripe of=/dev/null bs=64k > count=2048 > 2048+0 records in > 2048+0 records out > 134217728 bytes transferred in 7.938773 secs (16906609 bytes/sec) > 0.007u 0.520s 0:07.98 6.5% 73+371k 2+0io 0pf+0w I can confirm the sequential read numbers for the DPTA-372730. The disk rotates at 7200 RPM and has extremely high bit density. Thus very high numbers for sequential read. I consistently get more than 23 MByte/s (M = 1000000 here). Haven't tried the sequential write yet. Right now I'm testing it with rawio, after having run some bonnie tests. Steinar Haug, Nethelp consulting, sthaug@nethelp.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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