Hi Matt

We've been running this configuration for the past couple of years. Not noticed any locking issues. As I understand it that's the objective of using Director.

As Aki notes make sure you have the appropriate NFS settings.

Other lessons we encountered.

Important to ensure NFS is NTP sync'd and aligned with your hosts, we hit some issues with file timestamps leading to problems.

Replication, e.g. for perhaps a backup or DR site. Seems to work but we've had the odd occasion of the indexes drifting. Never tracked the reason down and believe its unrelated to the NFS. Just something to monitor.

Regards Raymond

Message: 5 Date: Tue, 17 Oct 2017 08:50:18 +0300 From: Aki Tuomi aki.tuomi@dovecot.fi To: dovecot@dovecot.org Subject: Re: mdbox + director + nfs Message-ID: 70b54e75-14fe-2caa-eccb-1ffc05c2a1e5@dovecot.fi Content-Type: text/plain; charset=utf-8

NFS with mdbox should work just fine, locking should not be an issue, but please read https://wiki.dovecot.org/NFS

Aki

On 17.10.2017 02:32, Matt Bryant wrote:

Anyone had any experience they can share using a director setup with NFS and using the mdbox format instead of maildir. Is locking an issue on index files ??

rgds

Matt