In fact I just try to understand if Dovecot's behaviour is right and my
expectations are wrong, or vise versa. I mean when server see two
identical messages (files) both in cur and in new dirs it can compare
these files not only by name and rename if these names are the same, but
maybe check content of the messages.
11.01.2010 16:11, Tom Hendrikx пишет:
Hi,
This is a general backup issue (files changing during backup run) and
nothing Dovecot specific. You should look into something that gives you
a consistent view of the data, f.i. LVM snapshots (when you're running
linux).
Regards,
Tom
Alexander Chekalin wrote:
Yes, I'm trying to make some backup solution.
The idea was to have two identical (well, nearly identical) servers with
the same software and data on them, and while the first do its job as
SMTP and POP3/IMAP4 server, the second server just get copy of first's
current state (that is, copy user db and mail spool). In case of
something wrong with 1st server I'll just put its IP on second one and
will go on.
And the problem is that rsynced mailboxes sometimes have duplicates that
may confuse users. It happens when box changes between rsyncs by means
of Dovecot's ordinary operations (when msg file move from new/ to cur/
on 1st server and after rsync to 2nd this may produce two files with
same filename in new/ and cur/, and Dovecot for some reason renames one
of it).
Doing this using imapsync won't work. It is slow (hours vs minutes with
rsync) so I can't run it every 5 minutes, and, moreover, it crashes on
some messages, so can not rely on it in production.
Yours,
Alexander
11.01.2010 15:07, Charles Marcus wrote:
On 2010-01-11, Alexander Chekalin (acheka...@lazurit.com) wrote:
I'm not sure if this is intended behaviour. It is quite easy to see
such situation when doing periodical rsync (SMTP put message to new/
dir, then rsync copy it to second server, then message on the first
server move to cur/, and second rsync results in two files on second
server).
It there any workaround?
I would only use rsync for migrating to a new box, or for backups only...
It soundslike you're using the wrong tool for the job - maybe you should
be using something like imapsync?
Or, please describe what you are trying to accomplish?
