Bittorrent is harder to shape than most things.
I think the issue is lots of connections all going into fast start?
I liked Andy's idea of having a seperate queue for the first few Kbytes
of new connections and pegging it with a VERY short queue length. This
means that connections in fast start will get a packet drop very early
on unless they play very nicely
I guess one could do something like making it the very lowest priority
class in a standard HTB setup with near zero guaranteed rate and then it
would be self throttling, the first few connections can come in, mop up
all the bandwidth, and new connections after that get packet loss very
early on (because they only get the leftovers), forcing them to slow
down much more quickly.
Once they have transferred some small amount of data they fall back into
your normal traffic shaping queues and everything proceeds as normal.
I guess for an even better approach, only do this nasty trick on your
"bulk" incoming connections...
If anyone gives this a serious test then please do report back with your
findings
Ed W
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