Thread: more peering stuff, whats going on.
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Old 26-02-2006, 18:33   #25
Ignition
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Re: more peering stuff, whats going on.
Quote:
Originally Posted by JonathanLH
i've had 10mbit before in 1 stream from the us, just depends on the bandwidth available.
although the rtt does have an impact, the tcp recieve window can offset that.
i knew a formula at one point that told you the max bandwidth for a given rtt and tcp window, but i forgot it
It's easy really. Think about how much phatness you can handle at once, and how often you have to acknowledge data.

RWIN of 2000 for RTT of 100ms = max speed of 40,000 bytes / second if that helps (2000 bytes requiring an ack and can ack 20 times per second, each ack taking 1/2 of RTT)

So it's RWIN * ((1/RTT in ms) * 1000) * 2
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