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<H1>[Nel] TCP vs. UDP</H1>
<B>Dave Turner</B>
<A HREF="mailto:novalis%40novalis.org"
TITLE="[Nel] TCP vs. UDP">novalis@novalis.org</A><BR>
<I>Thu, 05 Jul 2001 11:14:47 -0400</I>
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<PRE>Vianney Lecroart wrote:
><i>
</I>><i> Hi everybody!
</I>><i>
</I>><i> Let's talk a little bit about this great subject: TCP vs. UDP
</I>><i>
</I>><i> Thanks to Valerio Santinelli and Olivier Lejade, there's some cool
</I>><i> discussion about this subject on the web and I would like to have your
</I>><i> thought and discuss about this.
</I>><i>
</I>><i> On Anarchy Online game, they only use TCP protocol between client and server
</I>><i> (other commercial online game use UDP) and it seems that it causes lot of
</I>><i> problem like horrible ping or connection lost:
</I>><i> <A HREF="http://aoforums.funcom.com/showthread.php?threadid=26297">http://aoforums.funcom.com/showthread.php?threadid=26297</A>
</I>><i>
</I>><i> There's also a mail on the MUD-Dev mailing list talking about these problems
</I>><i> here:
</I>><i> <A HREF="https://www.kanga.nu/archives/MUD-Dev-L/2001Q3/msg00009.php">https://www.kanga.nu/archives/MUD-Dev-L/2001Q3/msg00009.php</A>
</I>><i>
</I>><i> As you perhaps know, we only use TCP/IP (for server-server communication,
</I>><i> but also for the client-server connection) and we currently think more and
</I>><i> more about replacing the TCP client-server connection with a UDP one.
</I>><i>
</I>><i> In a first step, we would like to know your opinion about this choice. And
</I>><i> in a next step, we'll do some test about ping/packet lost and so on to
</I>><i> compare TCP and UDP, and we'll need your help to do that.
</I>><i>
</I>><i> Vianney Lecroart
</I>
There's often a lot of lag at the beginning of a UDP "connection" (yes,
I know UDP doesn't have those). Then gateways, which consider UDP to
have higher priority, remember that there's a connection, and things
start going faster. Your tests should be written with this in mind.
You might also want to look into XUDP,
<A HREF="http://www.gweep.net/~rocko/XUDP_Paper/paper.html">http://www.gweep.net/~rocko/XUDP_Paper/paper.html</A>
--
-[Dave Turner Stalk me: (215)-545-2859]
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