Re: NFS failures

[Randall Crook <rcrook_(_at_)_vtown_(_dot_)_com_(_dot_)_au>]

Dries Schellekens wrote:

> Hey,
>
> I'm doing large file transfers between OpenBSD 3.0 (server) and FreeBSD
> 4.4 (client). This makes the FreeBSD machine freeze sometimes (I guess
> kernel just stops for a while)
>
> Oct 26 01:12:47 warbird /kernel: nfs server matrix:/backup: not responding
> Oct 26 01:12:47 warbird /kernel: nfs server matrix:/backup: is alive again
> Oct 26 01:17:41 warbird /kernel: nfs server matrix:/home/gwyllion: not
> responding
> Oct 26 01:19:10 warbird /kernel: nfs server matrix:/backup: not responding
> Oct 26 01:19:10 warbird /kernel: nfs server matrix:/home/gwyllion: is
> alive again
> Oct 26 01:19:10 warbird /kernel: nfs server matrix:/backup: is alive again
> Oct 26 02:04:17 warbird /kernel: nfs server matrix:/backup: not responding
> ...
>
> I'm wondering who to blaim for this problem. I guess I can avoid this by
> using some mount_nfs options (-i to make the mount interruptible or -s
> soft mount), but the server shouldn't stop working in the first place (the
> machine is doing nothing else at the moment).
>
> Dries

Just a quick note. I have seen this occur over low (< 1Mb) speed links. 
It happens due to the nfs block size being too big. Try  using 
rsize=1024,wsize=1024 in the mount options. I don't know what network 
connection is between your systems but it may help.


Randall.....