[Dovecot] Replication protocol design #2

[Timo Sirainen]

On Thu, 2008-05-01 at 14:36 +0300, Timo Sirainen wrote:
> Support also super high latency replication (e.g. using USB sticks).

If it wasn't clear how this works:

"Client" and "server" are both Dovecots, client just has no/slow network
connection.

1. Client runs a command to create a replication batch file that's
stored on USB memory stick (or whatever).

2. The USB stick is plugged into another machine with a higher network
bandwidth to the server.

3. The replication batch file is copied to the server and a command is
run to process it. The command creates a reply batch file.

4. The reply file is copied to the USB stick and the file gets moved to
the client.

5. Client runs a command to import the reply file.

This works because the mailbox synchronization doesn't require more than
one roundtrip.

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