How to skip errors on doveadm backup for migration ?

[Christoph Adomeit]

Hi Farokh,

yes, imapsync is great. I tested it myself and it fetched all the mails.

Only Problem: Imapsync will loose the Email-UIDs so all Mail will be downloaded again by the clients after Server switch.

dsync is able to presere the Uids.

Thanks
  Christoph

On Sun, Jan 10, 2016 at 05:42:53PM -0500, Farokh Irani wrote:
> If both servers are using IMAP, maybe imapsync
> (http://imapsync.lamiral.info) would be an easier way to go...
> 
> Farokh
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> 
> >Christoph Adomeit <mailto:Christoph.Adomeit at gatworks.de>
> >January 8, 2016 at 05:50
> >Hi there,
> >
> >I have to migrate data out of a very old (debian 4) and buggy cyrus
> >mailserver.
> >About 40 Users with 200000 Messages each.
> >
> >Doveadm backup works quite well and gives me most of the mails. About
> >every 100.000 Mail
> >cannot be exported by cyrus. I do not want to bother about these errors.
> >Maybe it is filesystem, maybe it is memory leak, or cyrus bug or whatever.
> >
> >My problem is that doveadm backup exits with an error if it cannot read a
> >mail.
> >
> >
> >
> >Is there some way or option to make doveadm backup just skip the errors
> >and continue with the next message ?
> >
> >I want to use doveadm sync because it preserves the uids of the mails.
> >
> >Imapsync works great but does not prserve uids.
> >
> >cyrus2dovecot is not an option because it does not work incremental and
> >conversion would take far too long.
> >
> >Any ideas what I can do ?
> >
> >Thanks
> >Christoph

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Christoph Adomeit
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