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[Mldonkey-users] OT: P2P via SMTP and Open Relays

From: Christian Brandt
Subject: [Mldonkey-users] OT: P2P via SMTP and Open Relays
Date: Sat, 5 Apr 2003 07:26:33 +0200

Am Freitag 04 April 2003 19:54 schrieb Christian Brandt:

>  A local group of users once used it in a slightly less aggressive
> environment, all participants had local Mailservers on their
> dial-up-lines and DynDNS. So we send Chunks of 32MB via our providers
> relay by CC: targeted to five recipients with adresses like
> address@hidden, address@hidden and so on and thus the
> transfer should also be efficient from a providers perspective.

 I got request whats the clamour about. Well, basically SMTP contains 
something comparable to multicast, which means you send it once through 
your line to an SMTP-relay and that relay may resend it 10, 100 or 1000 
times to different recipients. So e.g. your 128kBit/s uploadline is busy 
for 15 hours sending a 700MB ISO to your relay, but then the relay resends 
it using its full bandwidth of 100, 622 or 1000MBit/s to clients using a 
downloadline of 768kBit, everyone of the eg 1000 receivers gets the full 
buzz within two hours and so circumventing the small uploadlines usually 
found at private homes.

 Thats right, in ideal cases 1000 users get the complete download within 
two hours without blocking the precious uploadline!

 That was a simplification, but the rather complex total concept could be 
contained in a nice programm hidding the complexity from the users. Also 
this isn't really P2P but a rather complex Server-Client-System, but who 
cares, its mostly about distributing incredible amounts of data in no time 
and at no costs.

 Btw even more Offtopic, on the mail-archives at all 
email-addresses like and got replaced by addresses... 
Christian Brandt

 life is short and in most cases it ends with death
 but my tombstone will carry the hiscore

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