> I'm currently running Cyrus IMAPd 2.2.13p1 on NetBSD/i386 without any
> problems. During the next few days I need to move the users' mailboxes
> to a NetBSD/amd64 system which will run Cyrus IMAPd 2.3.16. Some hints
> about this would be appreciated.
>
> The cleanest way would probably be to get Cyrus IMAPd running on the
> new
> system and then to copy the mailboxes via IMAP (using imapsync(1) or
> similar); but since the upstream on the old system is very slow I'd
> like
> to avoid this approach if possible.
>
> Since I can afford some hours of mail system downtime I'd prefer to
> copy
> over a compressed archive containing all the mailboxes, extract it on
> the new system and recursively run reconstruct(8) for all mailboxes;
> then I'd probably copy over the contents of $configdirectory/user/ and
> start Cyrus IMAPd. Does this make sense? And what data will I be
> missing? ;-)
>
> Some basic questions:
>
> - Is Cyrus on amd64 able to read skiplist files created by Cyrus on
> i386? (If not, I'd probably have to use cvt_cyrusdb(8) to dump and
> restore the relevant files.)
>
> - What about the cyrus.{cache,header,index,squat} files? Can I expect
> Cyrus on amd64 to be able to read them just fine? (This seems not to
> be that important since those files are easily recreated IIUC.)
>
YMMV, but here is what I have done in the past. From the destination, I rsync the source to get the bulk of the files over. Granted, this isn't a working copy when you're finished but it will cut down on the copy time. Then I shutdown all of the cyrus services and then do a final rsync to get everything else (including the core DB files). Just make sure that everything is stopped when you make that final copy.
Then start it up and test... I believe we did this from i386 to x86_64, but I can't remember as most of our mail VM's are on i386 again (vmware on some good, but non VT enabled hardware).
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