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Message: [QUOTE="jacopo, post: 3946203"] I am diving into Twisted and Perspective Broker (PB) in particular and I would like to understand more about what happens behind the curtains. Say I have a client and a server on two different machines, the server gets callRemote()’s in an asynchronous way, these requests are parked in a queue and then served sequentially (not in parallel – correct me if I am wrong). If everything is implemented in a single thread, how is it possible that while the processor is engaged in the processing triggered by callRemote()’s at the same time the reactor is ready to listen/accept new events and put them in a queue? To me it looks like there should be at least 2 processes, one for the reactor and on for the rest. In the documentation they keep stressing how one of the peculiarity of the reactor pattern is the single thread, but I can not figure out how. Any suggestion would be welcome. For the time being I recommend this doc which has been the most useful to me so far. [URL]http://www.artima.com/weblogs/viewpost.jsp?thread=230001[/URL] Thanks, Jacopo [/QUOTE]