It's a solution for people who don't have the expertise to handle setting up a clustered environment and/or don't want to manage everything, as well as taking advantage of our experience with mod_perl and our software. What we have done with the Gossamer Host cluster setup can also be done in your own setup if you have the time and experience/knowledge to set it all up. What we meant by the post was more of an example how our products can scale. Sorry about any confusion.

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Gossamer Threads Development Team