[Dovecot] How to remove duplicate GUID messages from storage?

[Timo Sirainen]

On 21.4.2012, at 23.29, Daniel Parthey wrote:

> The following command
> doveadm -v force-resync -u username at example.org INBOX
> outputs lots of messages like this one, with different GUID
> doveadm(username at example.org): Error: mdbox /mail/dovecot/example.org/username/mail/storage: Duplicate GUID 0b8a032d66a0924fb42c0000de5f8128 in m.55:45484041 and m.14:52173045

I think this is a force-resync bug and it shouldn't really complain about duplicates. Although I'm not entirely sure why with you it's complaining about them at all. I have anyway in TODO to look into this..

> How can I manually remove these identical, duplicate messages
> from the storage to save space? Dovecot does not do it
> automatically.

Perhaps force-resync + purge should do that, but currently it doesn't.

Also it would be nice if doveadm import didn't add duplicates in the first place. This is also something for which I have vague plans, because it would help dsync as well.