> On 04 September 2018 at 23:20 Robert Schetterer <r...@sys4.de> wrote: > > > Am 04.09.2018 um 18:27 schrieb Sami Ketola: > > > > > >> On 4 Sep 2018, at 18.38, Robert Schetterer <r...@sys4.de> wrote: > >> > >> Sorry i migrated terrabytes of mail with imapsync and never had a > >> problem, it works as designed, also with maildir rsync did a good job, > >> what never worked as it should was dsync ,cause of bugs ,that may > >> changed now > >> > > > > I would like to very much hear about the problems you had with dsync as we > > have successfully migrated tens of petabytes of mails with it successfully > > while preserving the UID numbers. > > Imapsync would have been totally out of question as it is absolutely > > crucial in those migrations to keep the UID -> MAIL pairs matching legacy > > server. And usually also POP3 UIDLs. If not keeping the data the servers > > would have literally melted under load when switching over then of > > thousands of users forcing them to redownload headers of even mail bodies > > for millions of mails. > > > > Sami > > > > > > I think you should know the dove buglist, i used dovecot since the beginning > and believe me dsync had a lot of problems, as i stated i hope this had > changed now. I didnt used/tested it again the last years cause i had no > big migration job to do, we ever tried to use it that days cause youre > right we would have prefer not broke pop3 stuff at migration. But it > never worked, so imapsync was the best way to go, also having courier, > cyrus migrations with format/namespace change etc. > > Imapsync works as designed and migration might not be ideal at some > points but it has no real stoppers if migration is well prepared and > organized. > > > Best Regards > MfG Robert Schetterer
There has been progress with dsync in the past years, and it can do courier and cyrus migrations with format/namespace changes. "Few years ago" is a long time. Aki > > -- > [*] sys4 AG > > http://sys4.de, +49 (89) 30 90 46 64 > Schleißheimer Straße 26/MG, 80333 München > > Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 > Vorstand: Patrick Ben Koetter, Marc Schiffbauer > Aufsichtsratsvorsitzender: Florian Kirstein
