Re: [Dovecot] migrate 15K users to new domain name

On Thu, Apr 19, 2012 at 11:22, Jan-Frode Myklebust <janfrode@tanso.net>wrote:

I need to migrate 15K users to a new domain name, and plan to use "dsync mirror" in the transition phase. Could someone confirm that this should work:

Before giving users access to new-domain do a first sync to get all the stale data over:

   for user in $old-domain; do
           dsync mirror $user@old-domain $user@new-domain
   done

Configure sieve vacation filter to forward all messages from $user@old-domain to $user@new-domain, and notify sender of changed address.

Give users access to both new-domain and old-domain, and do a final sync.

   for user in $old-domain; do
           dsync mirror $user@old-domain $user@new-domain
           dsync mirror $user@old-domain $user@new-domain  # twice in

case the first was slow drop all messages for $user@old-domain Leave notice message for $user@old-domain saying he should use new-domain done

Wait a few weeks/months, and then drop all users@old-domain.

Does this look sensible?

-jf

What do you mean by a "new domain" in this context? Is the server changing? Is the storage changing? In my thinking, a domain change is as simple as using a rewrite rule in your MTA. I am sure I didn't understand your requirement and as such my response is equally vague.

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