[Dovecot] Problems restoring from dump

Paul Lathrop plathrop at squaretrade.com
Mon Sep 18 23:12:50 EEST 2006


Hello all,

First, the vital stats: FreeBSD 6.1-STABLE, dovecot 1.0.rc7 from ports.

I have run into a vexing little problem that has brought my deployment
of a shiny new dovecot server to a screeching halt. Using 'periodic'
I've configured regular backups to occur using 'dump'. I have a monthly
level 0, a weekly level 4, and a daily level 8. These dumps take
advantage of snapshots to ensure they are taking a backup of a
consistent filesystem. As part of the beta testing, I decided to delete
my maildir and attempt to recover from the dumps.

Recovery went well, as dump/restore is a wonderful piece of software. I
did a quick check at the file level to be sure my mailbox looked like it
had when I took the last level 8 dump, and everything looked good. The
problem came when I started up Thunderbird to take a look at my mail.
When I selected a message, say one that said "knockout daily run
output", I'd be reading a different message entirely, like a recent
email from my boss! Most of the messages were like this - hopelessly
scrambled! I tried just deleting the account in Thunderbird and
connecting again, but that didn't change a thing.

What happened!? Dump has faithfully restored the files, including the
dovecot indexes... so why are my messages scrambled?

Thanks for your help,
Paul
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