NFS writes and ZFS

[Pawel Jakub Dawidek]

On Tue, Jul 22, 2008 at 11:28:27AM -0400, John Nielsen wrote:
> I have a FreeBSD server (which I use as a NAS device, among other things) 
> and a FreeBSD deskop. The desktop is running 7-STABLE from a couple days 
> ago and the server is running 8-CURRENT from yesterday. The server has 
> several NFS-exported ZFS'es which I mount from the desktop. Since moving 
> the shares to ZFS I've been having trouble writing to them from the 
> desktop--the mount hangs after the first or second attempt. This is 
> similar if not identical to what's described in the thread 
> (from -current) I partially copied below.
> 
> Today I discovered that the problem seems to go away if I change the NFS 
> mount options on the desktop. The following is a summary/timeline of what 
> I've tried:
> 
> 7-STABLE client, no NFS options (defaults); 7-STABLE server, UFS; works
> 7-STABLE client, no NFS options (defaults); 7-STABLE server, ZFS; broken
> 7-STABLE client, no NFS options (defaults); 8-CURRENT server, ZFS; broken
> 7-STABLE client, tcp,nfsv3,-r32768,-w32768; 8-CURRENT server, ZFS, works

Do you need all the options here? If not, could you try to find the
smallest subset of options that are needed to make ZFS work? Maybe
'nfsv3' is all that is needed, or 'tcp' alone fixes it? At work we use
many NFS exported ZFS file systems, mostly accessed from MacOS X and
we see no problems.

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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