Re: [xmlblaster-devel] UDP messages

["Michal Masa" <xmasam at sgi.felk.cvut.cz>]

> How much performance gain do you expect?
> I mean is it worth using UDP in opposition to TCP?

In our old system (C++ MFC TCP sockets [client] / Java [server]) we switched
to UDP and latency dropped considerably. Even though we used several TCP
socket settings to limit buffers and force immediate flushes...

----- Original Message ----- 
From: "Heinrich Götzger" <Heinrich.Goetzger at exploding-systems.de>
To: "xmlBlaster Developer List" <xmlblaster-devel at server.xmlblaster.org>
Sent: Friday, August 06, 2004 1:59 PM
Subject: Re: [xmlblaster-devel] UDP messages


> On Fri, 6 Aug 2004, Michal Masa wrote:
>
> > > Isn't it a problem in terms of reliability of delivery of the messages
by
> > > using UDP?
> >
> > Yes, you are right. We want to use UDP only for some specific messages
where
> > losses can be tolerated.
> > I was thinking about new SOCKETUDP protocol that would extend the
original
> > SOCKET.
> > In sendUpdate method, it would search the message qos for
<clientProperty
> > name='udp' type='boolean'>true</clientProperty>.
> > Such messages would be transmitted via UDP. It should also listen for
UDP
> > messages.
> > Any other ideas that would better conform to the whole system concept?
>
> How much performance gain do you expect?
> I mean is it worth using UDP in opposition to TCP?
>
> I've no idea how much the latency should decrease by just using UDP
> instead of TCP.
>
> I'm not quite sure, but shouldn't it be possible to just replace the
> TCP-specific part in the SOCKET implementation by some UDP related code?
>
> cheers
>
> Heinrich
>
> >
> > Regards,
> > Michal
> >
> > ----- Original Message -----
> > From: "Heinrich Götzger" <Heinrich.Goetzger at exploding-systems.de>
> > To: <xmlblaster-devel at server.xmlblaster.org>
> > Sent: Friday, August 06, 2004 10:04 AM
> > Subject: Re: [xmlblaster-devel] UDP messages
> >
> >
> > > On Fri, 6 Aug 2004, Marcel Ruff wrote:
> > >
> > > > Michal Masa wrote:
> > > > > Has anybody written a piece of code for transporting messages
using
> > UDP/IP?
> > > > > (TCP socket:// is fine, but we would like something faster with
lower
> > > > > latency).
> > > >
> > > > Not that i know off,
> > >
> > > Isn't it a problem in terms of reliability of delivery of the messages
by
> > > using UDP?
> > >
> > > cheers
> > >
> > > Heinrich
> > >
> > > >
> > > > regards
> > > >
> > > > Marcel
> > > > >
> > > > > Regards,
> > > > > Michal
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > > http://www.xmlBlaster.org