nfs performance issues.

[Tomoki Taniguchi]

thank you for you help i will definitely try testing different parameter.
i did find switching to async makes quite a bit of difference... but not
sure if i should stick with async.

On 9/7/07, Jonathan Hirschman <jonathan at hirschman.net> wrote:
> Tomoki Taniguchi wrote:
> > I seem to be suffering some performance problems when transfering
> > files over nfs.
> >
> Here's my fstab line from one of my clients:
>
> foo:/raid_local         /raid           nfs
> rw,hard,intr,rsize=65536,wsize=65536,nfsvers=3,tcp,async           0 0
>
> You'll note that I use TCP and a very large block size - it worked
> better for me. I also run async (this is against best-practices
> suggestions - use at your own risk). Note that sync is the default, but
> it is slow.
>
> Also- if you do interative performance testing tuning, you'll want to
> flush your caches between runs. You can flush the NFS cache by
> unmounting and remounting at the client. This may also be useful:
>
> http://linux-mm.org/Drop_Caches
>
> Good luck. It took me a while to get NFS running acceptably.
>
> jh
>
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Tomoki Taniguchi
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