So I spent the day trying to install Drupal with Mercury with instructions here
http://groups.drupal.org/node/70268 and
http://library.linode.com/application-s ... id#sph_id6
And I can
firmly say that both of those are too outdated to be functional at this point. The instructions at
http://groups.drupal.org/node/70268 are more up-to-date but are filled with too many errors to be functional either. I got so far as getting Hudson working but could never get it find the Mercury job.
For anyone looking to deploy Drupal here for a
production site, my recommendation would be to deploy Drupal 7 with Pressflow, memcache, and drush. Install Varnish in front of apache2, and install Apachesolr for apache itself. And then forget about all that other Mercury stuff. Those parts that I mentioned makes up ~80% of a "Mercury installation" and probably as much performance benefits, without all the messy. This would be close to what they ask you to do in the Mercury guide in the linode library, but as I understand it, while the installation is similar, the configuration of each individual part would be different than a "true" Mercury setup.