Perry Lorier wrote:
> Think it's only a few guys that are cool enough to have big enough 
> networks to see bandwidth delay issues on Long Fast Networks?
> 
> Next time you're on a XP machine on DSL, goto 
> http://nzadsl.co.nz/speedtest/ and check what speed you're getting. 
> You'll probably get no more than about 4.5mbit/s using a SINGLE tcp 
> stream.  (Multiple TCP streams will of course get more bandwidth)
> 
> This is because XP has a RWin of about 17,520ish bytes.  Latency over 
> the DSL network to the speed test is about 30ms:

[snip]

> But Wait! It gets WORSE. It's 170ms RTT to the US from here.  So:
> 
>   140160 bits / .17s = 824,470 bits/s == 824.5kbit/s.

[snip lots more clever maths]

So: All service providers should be looking at deploying ALGs/proxies 
running on hosts with much better TCP configuration, to avoid the long 
haul latency impact?

Easier than fixing every single client host...