We had previously given a way to implement two-way traffic control on a strict basis using a function which looped constantly to see if any data was available o read/write, and which processed it accordingly.

The following approach is based on a per-request basis. That is, an actors asks for n tokens to read (or write), and the manager sends it an answer when the actor is allowed perform the action. In effect, if the actor asks for 100 bytes and only 50 bytes can be exchanged per second, it will get a green light only after two seconds have elapsed.

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This post describes how to implement two-way (TCP for instance) traffic control in F# by modifying slightly a Trolltech article available at http://doc.trolltech.com/qq/qq17-ratecontrol.html.

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