Installation of ProcessWire in 2 server layers

[medcompanama]

We want to install ProcessWire in 2 server layers

In the first layer of servers is only to deliver the static content (css, js, image, html "ProCache"), without php installation the apache would be initialized in worker mode

In the second layer of servers, php will be available, the work will be done to process all the requests of the pages that are not in ProCache and of the services that require php execution.

The servers of the first layer would reach the servers of the second layer through a ProxyBalancer.

My questions are:

How can I take the configuration of .htaccess to virtualhost?

The setting RewriteRule ^(.*)$ index.php?it=$1 [L,QSA] can be changed for RewriteRule ^(.*)$ proxybalancer://secondservers/index.php?it=$1 [L,QSA]

[spoetnik]

Why??

Why not just php-fpm and nginx as a proxy? That's a more know architecture with blogs explaining the setup, and google-hits when it's not working...