On Dec 7, 2007, at 3:49 PM, Dave Howorth wrote:
On Fri, 2007-12-07 at 15:34 +0100, Hans Witvliet wrote:
For larger files, you can not use the default mount options anymore!
You must use nfsvers=3 instead on nfsver=2 (and use tcp instead of
udp)
The default options since SuSe 9.x have been for TCP and NFSv3 by
default. It is still worth it to declare it in /etc/fstab for the
sake of clarity.
Hi Hans, Thanks for this. I will try it on Monday. But again, *this
has
been working for years.* I've been copying a file > 2 GB every two
weeks
for years, successfully, without using this option. It has only now
stopped working AFTER I installed 10.3 on the server. I haven't
changed
the client - where the mount request is made.
The client is where all the NFS mount options are asked for, so if you
haven't changed it, then perhaps that should be the first place to
look for the problem.
Could you please copy your mount entry from /etc/fstab on the client
and /etc/exports on the server and post them in this thread?
Something has broken backwards compatibility and I'd like to discover
what.
BTW, why do I need to use TCP?
Its debatable if you really need to use TCP in a non-WAN setting with
good hardware. UDP has no flow control and little has been added to
the protocol over the past 10 years or so. TCP is quite the
opposite. Using either has both advantages and disadvantages, it is
generally accepted that TCP is easier and better to use. Should you
choose to go with UDP there has been much conversation about not using
anything over an 8k rwsize because of problems it causes.
And if anybody knows, how can I discover whether any specific link is
using NFSV2 or NFSV3 and TCP or UDP?
On your client if you type `cat /proc/mounts` then you will get back a
full listing of your mounts and all the options they are connecting
with to your nfs server (including the ones that are defaults that you
wouldn't normally see in just /etc/fstab. Typing `mount` will also
return how you are connected to the nfs server but with the default
connection information hidden and extended options you might have used
in /etc/fstab shown.
Cheers
Todd
Systems Administrator
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Soho VFX - Visual Effects Studio
99 Atlantic Avenue, Suite 303
Toronto, Ontario, M6K 3J8
(416) 516-7863
http://www.sohovfx.com
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