Why is NFSv4 so slow?

Hannes Hauswedell h2+freebsd at fsfe.org
Wed Sep 1 14:14:19 UTC 2010

Hi everyone,

I am experiencing similar issues with newnfs:

1) I have two clients that each get around 0.5MiB/s to 2.6MiB/s reading 
from the NFS4-share on Gbit-Lan

2) Mounting with -t newnfs -o nfsv3 results in no performance gain 

3) Mounting with -t nfs results in 58MiB/s ! (Netcat has similar 
performance) → not a hardware/driver issue from my pov

Is there anything I can do to help fix this?

Thank you,
Best Regards,            │ Free Software Foundation Europe    █▉   │
Hannes Hauswedell        │           German Team            █▉█▉█▉ │
                         │ Coordinator for pdfreaders.org     ▉▉   │

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