Re: replication in Postgres

On Sun, 2007-11-25 at 23:38 +0100, Alexander Staubo wrote:
> On 11/25/07, Glyn Astill <glynastill@yahoo.co.uk> wrote:
> > So far the only methods I see would be usable for us are Slony I and
> > WAL log shipping.
>
> WAL shipping probably does not work the way you think it does. The
> secondary server that receives the log pieces is not actually able to
> serve any queries; it only processes them as part of a sort of
> indefinitely extended recovery procedure. Therefore, the current
> shipping support is only good for maintaining a "warm standby" server.
> The manual explains this in detail.
>
> Someone is working on extending the current system to allow read-only
> queries on a standby server [1], thus making it a "hot standby", but
> this feature apparently won't be included until 8.4 [2].
>
> [1] http://archives.postgresql.org/pgsql-hackers/2007-02/msg01390.php
> [2] http://archives.postgresql.org/pgsql-general/2007-09/msg00752.php

http://archives.postgresql.org/pgsql-general/2007-11/msg01193.php

--
  Simon Riggs
  2ndQuadrant  http://www.2ndQuadrant.com