Re: suggestions/hints for multimaster solution

On Fri, Jan 9, 2009 at 11:32 AM, Gerd König <koenig@transporeon.com> wrote:

> Perhaps we should have a look at
> * pg_pool(II)

I can only speak of pgpool-II. It's working fine for me in a setup
which is exactly the same one you have (change OpenSuse for Debian,
but the rest is the same). The thing is that pgpool-II itself can
become a single point of failure unless you provide HA for it (I am
doing so with Heartbeat), but IMHO that would then be a failover
solution, not a multimaster (from pgpool-II's point of view, not the
databases behind pgpool-II).

Next thing I want to do is try Slony-I with pgpool-II, but I think
that is not a multimaster solution either.

Of course we may have different points of view on what multimaster mean :)

If you plan on using pgpool-II, take into consideration that
replication is done at a SQL query level, which is cool, but has its
limitations. If you use Slony-I inside pgpool-II I think you can take
over those limitations, but the solution is not so... neat, so to
speak :)

/discuss

--
Jaume Sabater
http://linuxsilo.net/

"Ubi sapientas ibi libertas"