--- On Thu, 10/7/10, Tatsuo Ishii <is...@postgresql.org> wrote:

> > The scenario I'm most interested in is this:
> > 
> > 2 servers - a master and a hot standby. All writes are
> sent to master, reads are split between master and hot
> standby.
> > 
> > 1) If the hot standby goes down, how do I redirect
> reads to the master?
> 
> pgpool-II 3.0 will take care of this.
> 
> > 2) If the master fails
> >     -how do I automatically
> promote the standby to master and send all reads/writes to
> the new master?
> 
> This is covered by pgpool-II 3.0 as well.
> 
> >     -what happens when the old
> master comes back up? Do I need to so anything to make it
> catches up to the new master?
> 
> I recommend to use it a standby. Such a configuration is
> possible by
> using pgpool-II 3.0.
> --

Oh so I'd still need a proxy such as pgpool-II for HA setup?

I was thinking that with the new built-in replication in 9.0 there would be no 
need to use pgpool-II.

If pgpool is still necessary why not also use it for replication? What would be 
the advantages of using the 9.0's built-in replication as opposed to pgpool's 
replication?





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