The Marionette Collective AKA mcollective is a framework to build server orchestration or parallel job execution systems.
Primarily we'll use it as a means of programmatic execution of Systems Administration actions on clusters of servers. In this regard we operate in the same space as tools like Func, Fabric or Capistrano.
We've attempted to think out of the box a bit designing this system by not relying on central inventories and tools like SSH, we're not simply a fancy SSH 'for loop'. MCollective use modern tools like Publish Subscribe Middleware and modern philosophies like real time discovery of network resources using meta data and not hostnames. Delivering a very scalable and very fast parallel execution environment.