[Dovecot] Finally upgrading from v1.0.15 to v1.2.16 -- advice please

[Timo Sirainen]

On Tue, 2011-01-04 at 11:40 +0100, Jan-Frode Myklebust wrote:
> On Tue, Jan 04, 2011 at 11:35:42AM +0200, Timo Sirainen wrote:
> > 
> > You could have upgraded from v1.0 to v1.1 or v1.1 to v1.2 incrementally,
> > but v1.2's index changes haven't been backported to v1.0, so if v1.0
> > accesses indexes modified by v1.2 you'll probably get some errors.
> > 
> 
> I think we'll just jump in with both feet, and upgrade them all to v1.2
> at the same time. If, in worst case, we need to downgrade, do we need to
> delete all indexes first, or will the errors resolve themselves ?

They should resolve automatically, but there may be bugs which cause
crashes and those might not get resolved automatically.

> I just tested accessing the same mailbox over imap first against v1.2
> then against v1.0.15, and didn't see any problems logged. But maybe that
> was too light testing to reveal any problems..

If you expunge messages in v1.2 I think v1.0 won't understand those.

> > > Does the below look correct ?
> > > 
> > > 	user_attrs = mailMessageStore=mail=maildir:%$:INDEX=/usr/local/atmail/users/indexes/%1u/%1.1u/%u, mailQuota=quota_rule=*:storage=%$
> > > 
> > > i.e. will it point dovecot at:
> > > 
> > > 	mail = maildir:/usr/local/atmail/users/j/a/janfrode at domain1.net:INDEX=/usr/local/atmail/users/indexes/j/a/janfrode at domain1.net
> > > 	quota_rule=*:storage=1000000
> > 
> > Yes. Although if the mail directory can be created by such a template,
> > you could do it without having the directory in ldap at all..
> 
> What would I then have on the left hand side of the expression instead
> of ldap attribute ? Hmm, I think I'll stick with the ldap attribute, to
> force us to keep the ldap data correct in case we ever want to replace
> some parts of dovecot with something that doesn't allow such templating.

I meant that you'd remove "mail" entirely from ldap stuff, and use
mail_location setting instead.
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