Re: libpq connectoin redirect

feng tian wrote:
> Hi,
>
> I want to load balance a postgres server on 4 physical machines, say
> 127.0.0.11-14. I can set up a pgbouncer on 127.0.0.10 and connection
> pooling to my four boxes. However, the traffic from/to clients will
> go through an extra hop. Another way to do this, is to send the
> client an "redirect" message. When client connect to 127.0.0.10,
> instead of accepting the connection, it can reply to client telling it
> to reconnect to one of the server on 127.0.0.11-14.
>
> I am planning to write/submit a patch to do that. I wonder if there
> is similar effort in extending libpq protocol, or, if you have better
> ideas on how to achieve this.

how do you plan on maintaining consistency, transactional integrity and
atomicity of updates across these 4 machines?