Refer to - http://www.infinitegrid.org/drupal/content/Nails

Nails bangs it all together, mostly via the command pump.


Not sure where else to put this, but nails I think is the bit that
drives the network traffic the most -

http://gettys.wordpress.com/2013/07/10/low-latency-requires-smart-queuing-traditional-aqm-is-not-enough/