[Bug 458979] New: nfs v3 and v4 performance is /really/ bad
https://bugzilla.novell.com/show_bug.cgi?id=458979 Summary: nfs v3 and v4 performance is /really/ bad Product: openSUSE 11.0 Version: Final Platform: x86-64 OS/Version: Other Status: NEW Severity: Normal Priority: P5 - None Component: Network AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: jnelson-suse@jamponi.net QAContact: qa@suse.de Found By: --- Long around September of 2008 (this year, for the next 16 or so days) I did some quick benchmarking of NFS(v3). I was able to see, pretty reliably, 45 MB/s or so. This is with a benchmark like this: dd if=/dev/zero of=some_file bs=1024k count=10000 conv=fdatasync Where $CWD is on an NFS share. I recently re-tested and got really, *really* awful numbers. dd reports a high of 19MB/s (iptraf reports more like half of that). The NFS server's filesystem is not to blame: A test on the actual NFS server's *local* filesystem (the filesystem that has been exported shows not less than 50MB/s, as high as 80MB/s, depending on whether I use ext2, ext3, jfs, or xfs. TCP performance between the two machines averages 50-60MB/s (client->server) and 110-112MB/s (server->client), so it's not network. If it's not network, and it's not the local filesystem performance, it has to be NFS. Where did the performance go? I even tried NFSv4 and the performance was *worse*, not better, than NFSv3. NFSv3 mounted like this: mount -t nfs 192.168.2.1:/exports/huge /mnt -o async,rsize=32768,wsize=32768 and NFSv4 mounted like this: mount -t nfs4 192.168.2.1:/huge /mnt -o async,rsize=32768,wsize=32768 Both over TCP. This is using 2.6.25.18-0.2-default (the stock kernel for openSUSE 11.0, x86_64) which is a more recent kernel than my original tests in September. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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User jnelson-suse@jamponi.net added comment
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--- Comment #1 from Jon Nelson
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User jnelson-suse@jamponi.net added comment
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--- Comment #2 from Jon Nelson
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User jnelson-suse@jamponi.net added comment
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--- Comment #3 from Jon Nelson
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Cyril Hrubis
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Greg Kroah-Hartman
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User jnelson-suse@jamponi.net added comment
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--- Comment #4 from Jon Nelson
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User jnelson-suse@jamponi.net added comment
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--- Comment #5 from Jon Nelson
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User jnelson-suse@jamponi.net added comment
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Jon Nelson
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