On Wed, 2009-10-14 at 23:18 +0200, Mikkel wrote: > >> I don't think I've tried that one. Earlier on I experimented with > >> fsync_disable=yes (which made a huge difference by the way) but that was > >> before I started using mail_nfs_storage=yes and mail_nfs_index=yes > >> > >> I would like to try using maildir_very_dirty_syncs=yes but is it > >> advisable in combination with NFS? > > > > It should be fine with NFS if indexes are also on NFS. Although I just > > fixed a bug related to it: > > http://hg.dovecot.org/dovecot-1.2/rev/7956cc1086e1 > > > > The system is currently running dovecot version 1.1.19. Would you > consider it safe to try it on that version as well?
Yes. v1.2.6 + these two patches should make the performance better: http://hg.dovecot.org/dovecot-1.2/rev/ebdba086e3b1 http://hg.dovecot.org/dovecot-1.2/rev/7956cc1086e1 > > Indexes on NFS are problematic now though if multiple servers can access > > the mailbox at the same time. mail_nfs_index=yes is supposed to help > > with that, but it's not perfect either. Long term solution would be for > > Dovecots in different machines to talk to each others directly instead > > of through NFS. > > Is worse now than previously? With dbox index corruption becomes a worse problem than with maildir, because index is the only location where message flags are kept. v2.0 creates dovecot.index.backup files every once in a while though. > I have been running at production setup with two servers accessing the > same Maildir data from NFS without any problems for quite a while now. > Load is spread randomly between the two servers so I can only assume > that by coincidence they sometimes try to access the same mailbox. > This has functioned quote well with many versions of the 1.1.x dovecot > releases so unless some new issues have been introduced I don't think I > should fear anything in that regard :-) And you've actually been looking at Dovecot's error log? Good if it doesn't break, most people seem to complain about random errors.
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