NFSv4 and Maildir

[Joseph Tam]

> 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>