[ubuntu-uk] Weird NFS behaviour with Windows Clients and Ubuntu server

[Matthew Daubney]

Hey all,

Bit of an odd question as I'm certain it's a fault in the windows
clientside, but in case anyone here has seen this problem before....

I'm trying to transfer some large files (250GB + ) onto a raid set using
NFS. When I used a Linux or Mac NFS client I can sustain a fast transfer
at a very stable rate. When I use a Windows client (using the Services
for Unix client) the rate is stable for a few minutes, then drops off to
nothing, then rises and becomes stable for a few minutes, then drops off
to nothing.

This seems to be the same if I use samba (it just runs at a slower rate,
~12.5% of the total available transfer speed, and the dropouts are
shorter), unfortunatley this is not fast enough for the job in mind, and
is the dropouts are unacceptable in the environment the server is going
into.

Has anyone seen this kind of behaviour before, and if so, any idea how
to stop it?

Thanks,

Matt Daubney