On Wed, 2008-03-19 at 09:13 +0100, Xavier Beaudouin wrote: > Hello, > > I have recently changed imap from Courier-imap to dovecot because of > serial problems with courier-imap, I have being forced to do it very > quickly... and without extensives tests. > > I have 3 mails servers (freebsd based) behind a load balancer and a > nfs mailstore on a netapp. > > On my first tests I have setup the index into some nfs shared mount, > but it seems that some imap clients are going mad when deleting files > (mostly because they do open some new imap connection and the index > was not clean) so I have changed index to memory. > > This has fixed one of my problems.
Best solution would be to use v1.1 and its mail_nfs_*=yes settings. They make Dovecot work very well with NFS. > Now I have some strange problems is that NFS activity passed from > about... 5mbps to more than 70Mpbs... Do you use also POP3? Other than that I can't think of why it would give worse performance than Courier. Also have you read http://wiki.dovecot.org/NFS?
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