[Pgpool-general] Pgpool-II and Slony-I

Glyn Astill glynastill at yahoo.co.uk
Wed Aug 27 08:52:56 UTC 2008


> Sorry for the poor documentations. Actually the settings
> for using
> master/slave mode is surprisingly simple. If you are
> running Slony
> master on host foo port 5432 and a slave on host bar port
> 5433, the
> settings for pgpool.conf would look something like:
> 
> backend_hostname0 = 'foo'
> backend_port0 = 5432
> backend_weight0 = 1
> backend_data_directory0 = '/usr/local/pgsql/data'
> backend_hostname1 = 'bar'
> backend_port1 = 5433
> backend_weight1 = 1
> backend_data_directory1 = '/usr/local/pgsql/data'
> 
> replication_mode = false
> master_slave_mode = true
> load_balance_mode = true
> 
> In the master/slave mode, pgpool will throw all DMLs to
> master
> only. SELECTs will be thrown to master and slave.
> 

Thanks Tatsuo, that helps but I'm full of questions...

Does it support a 3rd slave?  
I presume it works when the machines are on different hosts and the same port? 
How is the backend_data_directory used? 
My install references master_backend_hostname etc instead of backend_hostname0 etc, should I change these or will it support tertiary_backend_hostname etc?


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