From: ron minnich <rminnich@lanl.gov>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Multi-stack mail problem.
Date: Tue, 30 Sep 2003 11:18:47 -0600 [thread overview]
Message-ID: <Pine.LNX.4.44.0309301115020.19674-100000@maxroach.lanl.gov> (raw)
In-Reply-To: <021501c38775$a06801c0$b9844051@insultant.net>
On Tue, 30 Sep 2003, boyd, rounin wrote:
> checksums? we don't need no stinkin' [UDP] checksums -- Sun
well and lots of other people who have been fooled. HP, for example, had a
'smart NIC' in the 80s. Worked great. Except you couldn't ftp certain
files.
And then there was atm. and hippi 800. and myrinet. and quadrics. I'm sure
infiniband will make the same mistake. People keep forgetting: end to end
does NOT mean card-to-card.
We just saw this the other day on myrinet: a certain data pattern would
induce a problem in one out of 2048 links, on one point-to-point link, on
one tcp port. Fun to diagnose, as the symptom was a stuck tcp queue. It
was a bad switch port.
ah well. Networks (and network designers) should stop trying to make
promises they can't keep.
ron
next prev parent reply other threads:[~2003-09-30 17:18 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-30 0:48 Dan Cross
2003-09-30 1:12 ` David Presotto
2003-09-30 8:00 ` Lucio De Re
2003-09-30 8:20 ` Charles Forsyth
2003-09-30 8:41 ` Lucio De Re
2003-09-30 8:54 ` boyd, rounin
2003-09-30 9:34 ` C H Forsyth
2003-09-30 8:42 ` boyd, rounin
2003-09-30 8:52 ` Lucio De Re
2003-09-30 9:16 ` Fco.J.Ballesteros
2003-09-30 9:27 ` Lucio De Re
2003-09-30 9:38 ` C H Forsyth
2003-09-30 9:39 ` Geoff Collyer
2003-09-30 9:41 ` Geoff Collyer
2003-09-30 12:07 ` C H Forsyth
2003-09-30 17:09 ` boyd, rounin
2003-09-30 17:18 ` ron minnich [this message]
2003-09-30 17:45 ` C H Forsyth
2003-09-30 9:48 ` Bruce Ellis
2003-09-30 9:55 ` C H Forsyth
2003-09-30 11:51 ` Lucio De Re
2003-09-30 17:07 ` boyd, rounin
2003-10-01 8:32 ` Fco.J.Ballesteros
2003-09-30 9:41 ` Geoff Collyer
2003-09-30 9:16 ` boyd, rounin
2003-09-30 9:37 ` Lucio De Re
2003-09-30 9:52 ` boyd, rounin
2003-09-30 9:53 ` Geoff Collyer
2003-09-30 10:11 ` boyd, rounin
2003-09-30 10:13 ` boyd, rounin
2003-09-30 11:51 ` C H Forsyth
2003-09-30 17:00 ` boyd, rounin
2003-10-01 0:09 ` Geoff Collyer
2003-10-01 0:23 ` Charles Forsyth
2003-09-30 13:29 David Presotto
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