[CentOS] nfs slow?
Stephen John Smoogen
smooge at gmail.com
Tue Dec 16 22:54:32 UTC 2008
On Wed, Dec 10, 2008 at 12:07 PM, Davide Cittaro
<davide.cittaro at ifom-ieo-campus.it> wrote:
> Hi all, I'm migrating from Gentoo to CentOS... I'm experiencing a
> rather low performance in NFS r/w (as client).
> NFS server is solaris (which exports zfs volumes via nfs). The very
> same exports were mounted with the same parameters (auto,nosuid,exec)
> on gentoo and centos server (bot x86_64)... It happens that centos is
> 5-10 times slower either in read and write operations... Ok, I'll try
> to tune rsize and wsize, but does anybody have an hint on this low
Which version of CentOS are you using? The upstream kernels have had
issues at different points with NFS performance (the 2.6.18 had a
bunch of problems that were fixed in 2.6.20-22 time frame and have had
to be backported.. then there were changes and breakage somewhere
after that.. ) I normally try a set of comparisons:
1) What does CentOS-4 do? What does CentOS-5 do? 4 may actually be
faster than 5 in some cases due to switch/card issues.
2) Then there are issues with TCP, size of frames, etc...
Stephen J Smoogen. -- BSD/GNU/Linux
How far that little candle throws his beams! So shines a good deed
in a naughty world. = Shakespeare. "The Merchant of Venice"
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