Hi Guys,

I've now experimented extensively (for appx 30 Hours) with various STinG
tweaks and improvements.  I found that one control has a strong effect
on the TCP upload speed, and is probably responsible for the low speeds
some of you have had.  Partially responsible I should say, because it
is also very much due to slowness in ISP responses.

The DEF_RTT setting, with a default value of 200 ms, is intended to give
the ISP side to 'shake hands' (ie: extend TCP window) befor the STinG
side starts retransmission of already sent blocks.  Many providers can
not respond that fast, so the connection congests, using the majority of
the bandwidth for retransmissions.

Raising the value to 500 ms should solve the problems for most of you,
though some of you may have need of a *slightly* higher settind, since
some ISP's do not use very 'straight' routing from modem pool to servers.
That increases 'latency' which demands a higher DEF_RTT.

Do not raise it too high though, as that also increases the time it will
take to recover after damaged packets. I advice a value less than 800 ms.

