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Date:      Tue, 2 Aug 2016 10:49:29 +0200
From:      Gerrit =?ISO-8859-1?Q?K=FChn?= <gerrit.kuehn@aei.mpg.de>
To:        freebsd-net@freebsd.org
Subject:   NFS on 10G interfaces still painfully slow
Message-ID:  <20160802104929.a10602a4786c68b4547a45b9@aei.mpg.de>

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Hi all,

I already reported this issue here a year ago and unfortunately was not
able to fix it back then. Now I had another run at it, using two recent
10.3-machines with a direct 10G link. I still see nfs is painfully
slow (around 20-80MB/s). I tried both nfsv3 and nfsv4, with almost the same
results. Everything I tried so far (mtu size, wcommitsize, readahead...)
only makes things worse or at least not much better.
Moving data in different ways (scp, ggate) is much faster, so plain
network speed should not be an issue.

Is there anyone around here who can confirm that nfs can go faster over
10G links?
Any hints for further tuning/debugging are greatly appreciated.


cu
  Gerrit



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