High availability and load balancing ...

Hi,

I need to do the setup for High availability function.

Also want to implement load balancing for 02 nodes.

I think PGPool will be require for that. Can I use PGPool without cost.

Can I get the basic steps to do this setup?

                Database        --          Postgresql 9.1

             OS                 --          Linux 6

Thanks & Regards,

Sunil N Shinde