Comment 60 for bug 661294

On Sat, Jan 8, 2011 at 3:02 PM, David <email address hidden> wrote:

> Now I'm bypassing the problem by limiting my network interface's
> bandwidth via 'wondershaper'. It takes care, that the transfer speed
> from the server to the client is always around 40 Megabytes per second,
> which seems to be a value which is not yet in the critical range (as we
> saw eralier, the problem only occurs at high transfer rates).
>
> I'm not yet fully satisfied with the rather intransparent way in which
> 'wondershaper' limits the speed (for example it seems to strongly reduce
> the upload speed eventough I tought I configured it in a way in which it
> only should affect the download speed) but I haven't yet found a better
> alternative (because 'trickle' which seems to offer a more transparent
> limitation in reality doesn't limit anything on my machine).
>
> Of course this is not really a solution, but it's some workaround I'll
> be probably be able to live with.
>
> But if anyone comes up with further possibilities of testing which could
> lead to a real solution, I'd of course be willing to assist.
>
> --
> You received this bug notification because you are a direct subscriber
> of the bug.
> https://bugs.launchpad.net/bugs/661294
>
> Title:
> System lock-up when receiving large files (big data amount) from NFS
> server
>

I commend your willingness to keep hacking at this. I gave up a long time
ago.
It appears that Ubuntu variants of 2.6.32+ kernels have an NFS client
problem that eventually takes the kernel down. There are numerous problem
reports on this. I've switched to debian for my clients that really matter
and no longer have the problem.

-Bruce