Lighttpd

In order to really have equally loaded application servers you should order your fastcgi.server directives by port and not by host, like so:

"http-1-01" => ( "host" => "10.10.1.10", "port" => 7000 ),
"http-2-01" => ( "host" => "10.10.1.11", "port" => 7000 ),
"http-3-01" => ( "host" => "10.10.1.12", "port" => 7000 ),
"http-1-02" => ( "host" => "10.10.1.10", "port" => 7001 ),
"http-2-02" => ( "host" => "10.10.1.11", "port" => 7001 ),
"http-3-02" => ( "host" => "10.10.1.12", "port" => 7001 ),