[50245] in North American Network Operators' Group
Re: PSINet/Cogent Latency
daemon@ATHENA.MIT.EDU (Matthew S. Hallacy)
Tue Jul 23 08:12:37 2002
Date: Tue, 23 Jul 2002 07:15:21 -0500
From: "Matthew S. Hallacy" <poptix@techmonkeys.org>
To: nanog@merit.edu
In-Reply-To: <20020723063440.GA5883@shekinah.ip.tiscali.net>; from koch@tiscali.net on Tue, Jul 23, 2002 at 08:34:40AM +0200
Errors-To: owner-nanog-outgoing@merit.edu
On Tue, Jul 23, 2002 at 08:34:40AM +0200, Alexander Koch wrote:
> Phil,
>
> imagine some four routers dying or not answering queries,
> you will see the poll script give you timeout after timeout
> after timeout and with some 50 to 100 routers and the
> respective interfaces you see mrtg choke badly, losing data.
>
> You see, the poll script is doing one after the other,
> mainly, so you wait too long and then the next run starts
> and then something.
>
> mrtg/rrd is not the tool of choice for accounting / billing
> but nice enough for showing you 'backup' graphs for visitors
> probably.
Hi.
From http://people.ee.ethz.ch/~oetiker/webtools/mrtg/reference.html:
Forks (UNIX only)
On a system that can fork (UNIX for example) mrtg can fork itself into
multiple instances while it is acquiring data via snmp.
For situations with high latency or a great number of devices this will
speed things up considerably. It will not make things faster though if
you query a single switch sitting next door.
As far as I know NT can not fork so this option is not available on NT.
Example:
Forks: 4
Of course, people would have to read the documentation first..
>
> Alexander
--
Matthew S. Hallacy FUBAR, LART, BOFH Certified
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