Michael Menge wrote: TV> I'll move several thousand cyrus mailboxes to a new server. Old TV> Server was running cyrus imapd 2.2, new server runs cyrus imapd 2.3. TV> I tar all users starting with A (later b,c,d..), create all TV> mailboxes on the new server with cyradm (script), extract the TV> tar file, reconstruct all mailboxes. TV> The only problemI have, is "seen.db". On my new server, every email TV> is marked as new, unread email. Is there a way to fix this? MP> Dump to flat file, copy to new server, convert back to desired bd MP> format. MM> You should also dump the mailboxes.db and import it on the new server, MM> this insures that the mailbox uid, which is used in the seen.db is MM> consistent. Another possibility is to use an rsync+reconstruct cycle to copy the message content, then (possibly asynchronously with the user switchover) use a scripted IMAP client like perl's Mail::IMAPClient to connect to old and new systems and transfer the metadata (read all the message flags, including "seen", on the source and set them on the target). This allows you to phase the migration if you have a large volume of data, and means you do not need to stick to the same namespace conventions on the target server(s). It also means you can redistribute mailboxes across a Murder differently to how they were in the source system(s). However unless you can keep identical message UIDs at both ends it doesn't scale well when you have folders containing very large numbers of messages, because your script must either hold all flags for all messages in memory, or keep doing search operations on one end or the other to find the relevant message by some more expensive identifier. Cheers Duncan -- Duncan Gibb - Technical Director Sirius Corporation plc - control through freedom http://www.siriusit.co.uk/ || t: +44 870 608 0063 Debian Cyrus Team - https://alioth.debian.org/projects/pkg-cyrus-imapd/ ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
