associate virtual guests for virtual hosts
sat6 system uuid is actually a String ...

like: e791b2ed-bc92-4c20-bddf-c6eea1fd9377
sort persistent map definitions
enhance error message
Reactor for asynchronous tasks
AsyncTasksReactor playground

Added couple of lines to play with
AsyncTasksReactor in case of issues.
Alternate status messages
Meanwhile in the real world...

...we use Ruby 1.8.7
Determine state of multiple asynchronous tasks
Start using AsyncTasksReactor