On Wednesday 04 April 2007 17:39, Jay Lee wrote:
> Zed wrote:
> > Hello world )
> >
> > We're going to migrate to new mailserver. Old and new mailservers use the
> > same set of services - FreeBSD, Postfix, Courier-IMAP, аll settings for
> > mail are kept in MySQL.
> >
> > We have a problem with moving users maildirs from old server to new one -
> > it must use too much time if offline.
> >
> > Is it possible to use users maildirs at old and new servers together and
> > transparently for users?
> > For example, user connects to new server by IMAP/POP3, new server looks
> > maildirs for this user in new place and in old place. After some time old
> > server will be stopped. Email will be received by new server, old server
> > will only keep old messages.
>
> NFS mount the old server's Maildirs on the new server.  Then use
> symlinks on the new server to point to the NFS Mount and user's home. 
> e.g.:
>
> New server mounts old servers Maildirs under:
> /mnt/oldserver/maildirs/
>
> New server has local Maildirs under:
> /var/maildir/
>
> already moved users would have Maildirs like:
> /var/maildir/joesmith/Maildir
>
> create symlinks so that users not yet migrated still appear in the same
> place on new server:
> /var/maildir/janesmith -> /mnt/oldserver/maildirs/janesmith


Hm...
I don't understand how users will migrate? If I create symlink from old 
maildir to new all messages will be placed in NFS mounted dirs on old server.



>
> Then you can keep your MySQL database unchanged and move the Maildirs
> over slowly.  Your other option would be to make the change in MySQL for
> persons on the old server, pointing their home at the NFS mount of the
> old server but the symlink method is easier IMHO.
>
> Jay

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