Date: Sun, 14 Feb 2010 22:58:58 +0000 From: Jonathan Belson <jon@witchspace.com> To: Joshua Boyd <boydjd@jbip.net> Cc: freebsd-stable@freebsd.org, Michael Loftis <mloftis@wgops.com> Subject: Re: More zfs benchmarks Message-ID: <B370102A-A1A6-4DB6-B922-07A592F5F543@witchspace.com> In-Reply-To: <33c6b0bc1002141315y6671e91dife7e80b926cb9d0b@mail.gmail.com> References: <EC10D2E9-04C7-4976-B377-62E79D9BE47A@witchspace.com> <CE7831DCD9767928D7F707B4@192.168.1.44> <33c6b0bc1002141315y6671e91dife7e80b926cb9d0b@mail.gmail.com>
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On 14 Feb 2010, at 21:15, Joshua Boyd wrote: > Repeated the same tests on my AMD64 dual core 4GB system with 5 = HD103SI 1T > drives in raidz1 on a Supermicro PCI-E controller, running 8-STABLE. [ snip results ] I was hoping I'd get something closer to these figures... > Here are my relevant settings: >=20 > vfs.zfs.prefetch_disable=3D0 > vfs.zfs.zil_disable=3D"1" I already had prefetch disabled, but retrying with zil disabled made no = difference. What is your arc_min and arc_max set to? >=20 > On Sun, Feb 14, 2010 at 3:34 PM, Michael Loftis <mloftis@wgops.com> = wrote: >>>=20 >> You really need to test with at least 4GB of data, else you're just = testing >> caching speeds on writing. Use a test suite like bonnie++ and you'll = see I'd expect to get more than 4MB/s if I was just measuring cache speed = :-) Cheers, --Jon
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