Date: Wed, 22 Mar 1995 15:18:02 +0000 From: Amancio Hasty <hasty@star-gate.com> To: hackers@FreeBSD.org Subject: Re: Why IDE is bad Message-ID: <199503221518.PAA01780@star-gate.com> In-Reply-To: Your message of "Wed, 22 Mar 1995 11:15:44 PST." <199503221915.LAA09736@gndrsh.aac.dev.com>
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Well to check out the assumption that synchronous updates affect the performace of normal file copies, I did a simple test: /bg is mounted normally time cp -R /bg/sys /bg/test 0.211u 8.486s 2:56.21 4.9% 62+413k 3634+8707io 3pf+0w Now with /bg mounted asynchronously: /bg > mount /dev/sd0a on / (local) /dev/sd0f on /usr (local) /dev/sd0e on /var (local) procfs on /proc (local) /dev/sd1f on /bg (asynchronous, local) /bg > time cp -R /bg/sys /bg/test1 0.204u 8.544s 2:51.12 5.1% 63+427k 3669+8706io 0pf+0w Is only 5 secondes faster... Amancio
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