dovecot - Sep 2016 - NFSv4 and Maildir

> we have a setup with (CentOS 6) Director+Dovecot, Maildir as storage on
> NetApp NFS v3. Every time I try to switch to NFS v4 I found issue with
> lock (and others). So for me NFSv4 with Maildir is "unstable" or
need a
> fine tuning that I don't know.
I found the same thing, and turning off write delegation seemed
to have solved the problem.  I still don't know why, though.

Joseph Tam <jtam.home at gmail.com>

On 01/10/2016 08:27, Joseph Tam wrote:
>> we have a setup with (CentOS 6) Director+Dovecot, Maildir as storage 
>> on
>> NetApp NFS v3. Every time I try to switch to NFS v4 I found issue with
>> lock (and others). So for me NFSv4 with Maildir is "unstable"
or need
>> a
>> fine tuning that I don't know.
> 
> I found the same thing, and turning off write delegation seemed
> to have solved the problem.  I still don't know why, though.
> 
> Joseph Tam <jtam.home at gmail.com>
write delegation is disabled by default on NetApp with v4, or have they 
changed this now?
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