[Dovecot] dsync - one or two ways?

[Timo Sirainen]

On Fri, 2009-07-17 at 11:59 -0700, Seth Mattinen wrote:
> > Now, the question is: Does anyone want dsync to only sync changes from
> > source to destination, instead of doing a full two-way sync? I think in
> > typical cases where you'd think you would want only one-way sync are
> > also the cases where there's no changes coming the other way in any
> > case.
> > 
> 
> Yes; moving mail from an old source (for example, my old home dovecot
> server which still occasionally gets mail, but otherwise I don't really
> use it). I wouldn't want all my current mail sent to it for this purpose.

dsync probably wouldn't be such a good idea for this use case anyway.
dsync assumes that an IMAP client has accessed the mailboxes in both
source and destination, so if there are any UID conflicts (and in the
case you describe there would be UID conflicts all the time) it gives
new UIDs for the conflicting messages.

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