Re: my broken TCP is faster on broken networks

Martin Mares (mj@atrey.karlin.mff.cuni.cz)
Fri, 11 Sep 1998 18:02:06 +0200

| Real users do not ever tolerate 2 minute delays. Don't be silly.
| They hit the "Stop" button after 2 _seconds_ and start a new
| connection to avoid the stall. They kill the window and telnet again.
| In general, humans know to kill and restart a slow network connection.

> You can mathematically prove that an exponential backoff is the
> minimal safe backoff for congestion avoidance

In fact, the user hitting the "Stop" button _does_ something very similar to
the exponential backoff algoritm -- if few retries won't help, he tries to
connect later and so on, still increasing the delays if the connection still
fails. Only the multiplicative constant is just too small. ;-)

Anyway, wouldn't it make sense to have cached per-destination
congestion state instead of per-connection values?

Have a nice fortnight

-- 
Martin `MJ' Mares   <mj@ucw.cz>   http://atrey.karlin.mff.cuni.cz/~mj/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
"The world is coming to an end...  SAVE YOUR BUFFERS!!"


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