Date: Wed, 25 Jul 2007 16:35:07 -0400 From: Howard Goldstein <hg@queue.to> To: freebsd-stable@freebsd.org Subject: [resolved, naively] Re: geom vs ich through ar device - benchmarks? Message-ID: <46A7B3FB.7010504@queue.to> In-Reply-To: <46A4E8FA.6010403@queue.to> References: <46A4E8FA.6010403@queue.to>
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Howard Goldstein wrote: > Has anyone done any benchmarks in desktop or server environment > comparing geom with an ICH controller through the ar device in RAID1 > service? Teh google, it seems to pick up grammar school math > assignments lots of what may be relevant hits for fortunate speakers of > German :( In case it may help someone else I've some benchmarks to share. These are trivial and naive benchmarks since they test only one case which probably is the worst case for geom. Testbed: Pair of WDC3200AAKS 320gb SATA, freshly newfsd 10gb filesystem mounted with softupdates, remounted after each test P4 @ 3ghz on a P4P800 in 6.2-STABLE, single user mode, ICH5R controller detects these SATA-II drives inexplicably as SATA-I Naive test: dd if=/dev/zero of=/fsundertest/tstfile bs=1m count=1000 *not including buffered stuff unwritten, the test simply reported dd's idea of the transfer time*, and then the other way where it doesn't matter In firmware's RAID1 Using the awesome gmirror write 1gb: 13.275 13.7 rd 12.9 13.8 Of course after this I used gmirror...
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