To: linux-kernel@vger.kernel.org
Path: forge.intermeta.de!not-for-mail
From: "Henning P. Schmiedehausen" <mailgate@hometree.net>
Newsgroups: hometree.linux.kernel
Subject: Re: [OT] testing internet performance, esp latency/drops?
Date: Mon, 8 Oct 2001 21:30:03 +0000 (UTC)
Organization: INTERMETA - Gesellschaft fuer Mehrwertdienste mbH
Lines: 56
Message-ID: <9pt5sr$eqb$1@forge.intermeta.de>
In-Reply-To: <20011008090203.L26223@work.bitmover.com>
Reply-To: hps@intermeta.de
NNTP-Posting-Host: forge.intermeta.de
NNTP-Posting-Date: Mon, 8 Oct 2001 21:30:03 +0000 (UTC)
Sender: linux-kernel-owner@vger.kernel.org

Larry McVoy <lm@bitmover.com> writes:

>However, web browsing sucks.  On about 80% of all links, there is a noticable
>hesitation, between 1-15 seconds, as it looks up the name and as it fetches
>the first page.  After that point, that site will appear to be OK.

This means, that 80% of all web site operators are too dumb to
configure a web server. Is it possible that your brand spanking new T1
addresses have no reverse name resolution? Are you using a proxy?

Look:

lm@bitmover   IP 1.2.3.4
    |
    |
"i want to surf to http://www.surf.xxx/"
    |
    |
    v
Website "www.surf.xxx"

"connect from 1.2.3.4" -> "Lookup for 4.3.2.1.IN-ADDR.ARPA"
                                       |
                                       |
                            1-15 Second timeout, "addr not found"
                                       |
                                       |
                                       v
                            send HTTP page to 1.2.3.4 anyway.


>Before I wander off to write a test for this, I'm wondering if anyone 
>knows of a test suite or a methodology which works.  I was thinking 

This has nothing to do with OSes, Linux or even a kernel. It is just
that most people on this net (and also most people who operate servers
or work at ISPs) are complete idiots that neither know how to operate
a webserver (set it to "name lookup off" and do address resolving for
web statistics offline) or an ip-space (how to setup a reverse
resolution).

I did consulting for an ISP that has > 50 Class C networks and not
_one_ had right forward and reverse resolution [1] as I arrived there.

	Regards
		Henning

[1] Now it has. ;-)      


-- 
Dipl.-Inf. (Univ.) Henning P. Schmiedehausen       -- Geschaeftsfuehrer
INTERMETA - Gesellschaft fuer Mehrwertdienste mbH     hps@intermeta.de

Am Schwabachgrund 22  Fon.: 09131 / 50654-0   info@intermeta.de
D-91054 Buckenhof     Fax.: 09131 / 50654-20   
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