[mythtv-users] diskless frontend nfs throughput

[Dan Littlejohn]

On Thu, Aug 13, 2009 at 8:17 AM, Thomas Börkel <thomas at boerkel.de> wrote:

> HI!
>
> Dan Littlejohn wrote:
>
> >     Well, I got a bit farther.  Letting the block size auto negociated
> >     made the write faster (Thanks Belcampo), but the read is still
> >     slow.  Is the /etc/init.d/nfsd script where you set the proc
> >     max_block_size echo?  I am running pxelinux so I believe I have to
> >     hard set the rsize and wsize in the pxelinux.cfg boot file, but it
> >     seems to make no difference to the read speed for different values I
> >     tried.
> >
> >     Here is a bit more info below with letting everything auto negociate
> >     with defaults including pxelinux when the root file system is
> >     mounted.  Any other suggestions to try to find the read bottleneck?
>
> I am also using a Gentoo PXE client. I found, that you cannot set NFS
> mount options as kernel parameters in pxelinux.cfg and 1024 is a hard
> coded block size in the scripts from genkernel. How did you get around
> this? I modified the initrd.scripts.
>
> See: http://bugs.gentoo.org/show_bug.cgi?id=262915
>
> This is more important since kernel 2.6.27, because from there on, NFS
> remount options in /etc/fstab are not allowed to differ that much from
> the initial options apparently.
>
> Thomas
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Hi Thomas:

I set the nfs parameters directly in the pxelinux.cfg/default file.  I will
try to remember to post exactly what I have when I get home.  One thing I
did notice if I had an incorrect parameter, pxelinux.cfg would ignore all of
the options and the nfs options were different in pxelinux vs what I have in
fstab.  Maybe this is your issue.

Dan
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