RoR performance analyis

Bruno Sousa wrote:

Does anyone knows any article, post (blog), research that treats about
"Performance analysis of Ruby on Rails applications on web servers
implemented on load balancing clusters"?

What would you specifically like to know? At RailsCluster we've got such
a setup, but I am not sure what you'd like to analyze and why that's
specific to load balancing clusters.

Bruno Sousa wrote:

I am looking for a comparison of different rails cluster solutions to
get to know which one is faster.

We do clustering in hardware, which is the fastest.

I'm not sure what the fastest software reverse proxy is, also depending
on whether you want to do layer 4 or layer 7 balancing. I suppose the
contestants are Apache, nginx, Squid, Varnish, Pen, Pound, LVS, and
probably others. You should be able to find pairwise comparisons on
Google.