If you can create the mailboxes on the new server, without replication,
perhaps it would be safer/less downtime to use IMAPsync to move the data
to the new server. It will be slow, but I don't mind slow while the
source server is still online and users are happy.
On 9/14/19 5:12 PM, Adrien Remillieux wrote:
Thank you for your answer !
Considering what you said I'll try to enable replication on the new
server. If it doesn't work I'll just schedule some downtime, copy the
/var/spool/cyrus folder to the new server, install cyrus 3.0.11 from
the backports and then upgrade the mailboxes in place.
We've been using cyrus since 2004 so there's definitely a lot of old
mailboxes around and I don't which versions of cyrus were used.
Cheers,
Adrien
Le dim. 15 sept. 2019 à 00:35, Adrien Remillieux
<adrien.remilli...@gmail.com <mailto:adrien.remilli...@gmail.com>> a
écrit :
Date: Fri, 13 Sep 2019 10:20:17 +1000
From: "ellie timoney" <el...@fastmail.com <mailto:el...@fastmail.com>>
To: info-cyrus@lists.andrew.cmu.edu
<mailto:info-cyrus@lists.andrew.cmu.edu>
Subject: Re: Possible issue when upgrading to cyrus 3.0.8 using
replication ?
Message-ID: <343a16a2-f5a2-4130-aae0-6a4994ab9...@www.fastmail.com
<mailto:343a16a2-f5a2-4130-aae0-6a4994ab9...@www.fastmail.com>>
Content-Type: text/plain; charset="us-ascii"
Hi Adrien,
The replication upgrade path should be okay. In-place upgrades
(that would use the affected reconstruct to bring mailboxes up to
the same version as the server) would get bitten. Whereas if you
replicate to a newer version server, the mailboxes on the replica
will be created at the replica's preferred version already, so you
don't need to reconstruct afterwards.
If you have messages that would theoretically be affected by this
bug in 3.0, you won't be able to replicate them to 3.0 in the
first place, because I think replication won't allow the 0 modseq.
If this arises, I'm not sure how to recover from it and replicate
the affected messages, since 2.4 and 2.5 won't alter the 0 modseq.
If it can't replicate them, it will complain about it, so if you
plan for the replication needing some handholding/restarting,
you'll at least be able to identify which messages are broken in
the process, and then figure out how to handle it once you know
the size of the problem?
Another option, if you want to stick with the Debian packages,
would be to skip 3.0.8 and install 3.0.11 from buster-backports
(https://packages.debian.org/buster-backports/cyrus-imapd), and
then you'll be immune to the problem. Though you still won't be
able to replicate the affected messages to the new server, hmm.
Cheers,
ellie
On Thu, Sep 12, 2019, at 6:50 AM, Adrien Remillieux wrote:
> Hello,
>
> I have a server that I can't update running cyrus 2.5.10 which
contain mailboxes that have existed from 2.3 and earlier (around
300Gb total). My plan is to update by enabling replication with a
new server running Debian Buster (so cyrus 3.0.8) and then
shutting down the old server. There was a problem when upgrading
to 3.x.x with mailboxes created with cyrus 2.3 or before and that
was fixed in 3.0.11 (see
https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.11.html
and https://github.com/cyrusimap/cyrus-imapd/issues/2839 for the
bug report)
>
> Does this upgrade path suffer from the same issue ? I am not
familiar with the inner-workings of cyrus. It appears that the
Debian maintainers have not backported the patch in 3.0.8 (see
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=933163 and I
looked at the source code)
>
> Cheers,
> Adrien
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