[K12OSN] SL 6.1 NFS client for FC 14, performance issues?

[Jim Kinney]

Tuning NFS is an art form. First make sure to use v4. The block sizes need
tweaks to max throughputs. There may also need to be a kernel param tweaked
but I'm not near my notes.
On Aug 26, 2011 4:28 PM, "Roland Roberts" <roland at astrofoto.org> wrote:
> Up until recently, my network was all Fedora 14. However, I turned on
> machine into SL 6.1 to act as an LTSP server. After doing so, I've run
> into some odd NFS performance issues. They show up as simply slow
> performance when doing builds, and I can't track down why. This is not
> really an LTSP issue, but I thought I'd check here since I thought
> people here might be more likely to have a larger heterogeneous network
> than the Fedora groups. I'll probably post there as well to see if
> anyone can give me some clues.
>
> For example, I when I did an RPM build of the 64-bit Sun Java 1.6.0.26
> package, it consistently takes 16-18 minutes when running on my LTSP
> server from my home directory with my NFS mounted home directory. The
> NFS server shows no significant load, the client (which is the LTSP
> server) also shows little load but top report about 50% wait times.
>
> If I run the build using a directory local to the LTSP server, the time
> drops to 2-3 minutes.
>
> The LTSP server is a Core2 Quad 3.0 GHz host running SL 6.1. The NFS
> server is a Core2 Quad 2.4 GHz running Fedora 14
>
> I have a second Core2 Quad 3.0 GHz host running SL 6.1. If I do the
> same set of tests there, the local file system build drops to under a
> minute, and the NFS build to 2-3 minutes. Clearly I get a performance
> hit going over the network, but the hit on the SL 6.1 LTSP server is
> rough to take.
>
> Does anyone here use NFS extensively for the LTSP and have encountered
> any performance problems?
>
> roland
>
> --
> PGP Key ID: 66 BC 3B CD
> Roland B. Roberts, PhD RL Enterprises
> roland at rlenter.com 6818 Madeline Court
> roland at astrofoto.org Brooklyn, NY 11220
>
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