[Dovecot] Performance-Tuning

[Peer Heinlein]

Am Dienstag, 8. November 2011, 15:16:12 schrieb Ralf Hildebrandt:

Hi,

> I wonder how I can incrementally change over from Maildir to mdbox?

If you have double diskspace:

Just use "dsync mirror" in the background to prepare the change. After that 
it's just a short downtime to migrate incremental the last changes, or it's 
just a question of a short login-script.

if [ -d ~/Maildir ] ; then
	dsync mirror voodoo-magic
	rm -R ~/Maildr
fi

> I can of course use dsync to mirror Maildir: to mdbox:, but how can I
> make dovecot look at Maildir FIRST and (if that fails) at mdbox? (or
> vice versa).

I wonder about that problem too. Even the last-last-last-quick sync would be 
so much IO, that I can't handle it in realtime in the morning at 9 a.m.

Looks like a nightly downtime for the last incremental run.

It would be MUCH easier if Dovecot could read maildir: or mdbox: from LDAP 
attributes. In this case the whole migration process could be split up into 
groups. Unfortunately we have shared folders and I don't know a way to read 
the *remote* mailbox-format from LDAP... So having users with maildir and 
mdbox mixed up will break their shared folders...

Peer


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