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<p>Good afternoon,</p>
<p><br /></p>
<p>I was trying to upgrade part of our Cyrus imap installation, concretely that one consisting in still 2.3. I was planning to set up Cyrus 3.0. I have seen all works properly except for the unexpunge command because as someone stated here, a reconstruct -V max was needed.The problem is that this reconstruct command, takes ages and I'm not able to keep the service offline so many time. So I have been thinking in the following scenario :</p>
<p><br /></p>
<p>- Cyrus 2.3 master -> Cyrus 2.4 slave</p>
<p>Get this 2.4 slave ready and set it as master. But here comes my first doubt. Does the 2.4 replication work with the 2.3 replication?. Can in this pair, both (the 2.3 and the 2.4) be both master and slave?. I mean to switch roles in the pair. Make one become master and the other slave and vice versa?.</p>
<p>Let's think now Cyrus 2.4 is ready and working.</p>
<p><br /></p>
<p>- Now, I would set up a new 3.0 slave. I know 2.4 could replicate with 3.0. So I would get the 3.0 ready and then set 3.0 as master. Can in this pair both the 2.4 and 3.0 be master and slave?. Meaning again to the same role switching commented before... to make one to be master and the other slave or vice versa....</p>
<p><br /></p>
<p>I'l will end up with 2 3.0 master and slave... but I need to trace the path...</p>
<p><br /></p>
<p>Does anyone see any other way?.</p>
<p><br /></p>
<p>Best regards,</p>
<p>-</p>
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