[JDEV] Sparse considerations about server status

[Dustin Puryear]

FYI, I plan on building checks for bounced messages within a few days
into the tools. Is this feature documented?

On 09 Aug 2001 14:11:49 -0500, Thomas Muldowney wrote:
> Yeah I think sheath is doing stuff with them.  The reason I ask about bounces,
> is because most of the queues that have set lenght or sizes will bounce back to
> sender if they are overflowed (as far as I'm to understand).  So although there
> isn't guaranteed delivery, there is a response if it can't be.  That's why I 
> say clients shouldn't need ACK's.  Although IQ msgs are always discussed.
> 
> --temas
> 
> On Wed, Aug 08, 2001 at 02:51:34PM -0500, Dustin Puryear wrote:
> > On 08 Aug 2001 12:16:08 -0500, Thomas Muldowney wrote:
> > > Like I posted earlier I need more specifics to investigate this.  Having clients
> > > build in safeguards is ridiculous!  This would be a server bug by far if no
> > 
> > Well, I spoke with Colin (we are both with Vedalabs) about this and he
> > mentioned that Jabber does not guarantee delivery. Is this true? If so
> > then any application that requires all messages to be delivered will
> > have to include some type of ACK feature.. I would think.
> > 
> > > bounce is happening and it is actually getting lost somehow.  It has high 
> > > priority in my books, but I need info, debug logs, incoming/outgoing XML for 
> > > both parties involved, and anything else that will help.
> > 
> > I can do this. Note however that jabberd has to be under a high load for
> > the problem to occur. That means you can expect _a lot_ of debug and log
> > data. Perhaps you would like to run the test suite on a personal test
> > box? It may be easier for you to see what data you need? Otherwise you
> > can expect a 50MB email from me. :)
> > 
> > Hmm, a while ago a guy from the OSDN asked for developer access to the
> > testing tools. It would be nice if he could run it on his test boxes as
> > well, but I'm not sure what happened to him.
> > 
> > Regards, Dustin
> > 
> > 
> > 
> > > 
> > > --temas
> > > 
> > > On Thu, Aug 02, 2001 at 12:04:56PM -0500, Dustin Puryear wrote:
> > > > On 29 Jul 2001 23:19:30 +0200, Gian Filippo Pinzari wrote:
> > > > > > Notice that at >= 120 user pairs (240 connected users), which equates to 
> > > > > > 120 msg/sec in this test, my message loss rate varies from 3% to 13%. 
> > > > > > The average delivery also climbs to .14 seconds, but I don't consider 
> > > > > > that a problem. (However, the worst case delivery times are bad: > 6 
> > > > > > seconds for 150 and 160 user pairs.)
> > > > > We've just developed a project (client+server) for one of the 
> > > > > biggest ISP in Italy. We found since the beginning that each 
> > > > > Jabber server was not able to handle more than a couple hundreds 
> > > > > client, so we implemented an architecture that load balances the 
> > > > > traffic among many concurrent servers running on the same or 
> > > > > different hosts. We also encountered message losses, but we didn't 
> > > > > care much :-). As Dustin, we thought this was due to client 
> > > > > problems.
> > > > 
> > > > Well, now that I know someone else has had a similar experience I can
> > > > only assume the problem is with jabberd. I had hoped that jabber.org
> > > > would confirm this to either be a problem or something they had built
> > > > into jabberd, but that information hasn't been very forthcoming.
> > > > 
> > > > In the end I suppose developers using jabberd need to realize that it
> > > > only works in low to medium load environments where message delivery is
> > > > not a big issue. Unfortunately, I am not sure if the same is true of the
> > > > jabber.com server since they didn't present any information on this
> > > > topic either.
> > > > 
> > > > Regards, Dustin
> > > > 
> > > > --
> > > > Dustin Puryear <dpuryear at usa.net>
> > > > http://members.telocity.com/~dpuryear
> > > > In the beginning the Universe was created. 
> > > > This has been widely regarded as a bad move. - Douglas Adams
> > > > 
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> > -- 
> > Dustin Puryear <dpuryear at usa.net>
> > http://members.telocity.com/~dpuryear
> > In the beginning the Universe was created. 
> > This has been widely regarded as a bad move. - Douglas Adams
> > 
> > _______________________________________________
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-- 
Dustin Puryear <dpuryear at usa.net>
http://members.telocity.com/~dpuryear
In the beginning the Universe was created. 
This has been widely regarded as a bad move. - Douglas Adams