Date: Sat, 5 Jun 2010 12:04:05 +0100 From: Bruce Cran <bruce@cran.org.uk> To: Stefan Miklosovic <miklosovic.freebsd@gmail.com> Cc: freebsd-hackers@freebsd.org, freebsd-questions@freebsd.org, Adam PAPAI <wooh@wooh.hu> Subject: Re: sysbench / fileio - Linux vs. FreeBSD Message-ID: <20100605120405.00007954@unknown> In-Reply-To: <AANLkTimofNc03PNO8MA0aNtpUEElaiD81kzp08AN5Tj4@mail.gmail.com> References: <4C09932B.6040808@wooh.hu> <201006050236.17697.bruce@cran.org.uk> <AANLkTimofNc03PNO8MA0aNtpUEElaiD81kzp08AN5Tj4@mail.gmail.com>
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On Sat, 5 Jun 2010 12:50:15 +0200 Stefan Miklosovic <miklosovic.freebsd@gmail.com> wrote: > > /var : ufs with softupdates > > /usr/obj : zfs with checksums disabled > > /usr/src : zfs with compression enabled > > /home : zfs with compression disabled and checksums enabled > > > > I ran a test with a blocksize of 8KB and 16 threads. > > > > /var : 25.2MB/s > > /usr/obj : 64.8MB/s > > /usr/src : 386.3MB/s > > /home : 60.3MB/s > > Do I understand it well? It seems that zfs with compression enabled on > /usr/src with 8KB block size and 16 threads performs 386.3MB/s which > is about 6 times better than debian5? I am thinking about this image > http://tech-blog.wooh.hu/~wooh/debian_vs_freebsd_io_16_seqwr.png Yes - on one run it even hit 500MB/s. I suspect, however, that the benchmark isn't accurate because it won't be writing typical data. Instead it's probably using a buffer that compresses very well. -- Bruce Cran
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