[lug] Nagios help?

[karl horlen]

also good points.  thanks

--- On Tue, 5/24/11, Sean Reifschneider <jafo at tummy.com> wrote:

From: Sean Reifschneider <jafo at tummy.com>
Subject: Re: [lug] Nagios help?
To: lug at lug.boulder.co.us
Date: Tuesday, May 24, 2011, 6:30 PM

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On 05/24/2011 07:09 PM, karl horlen wrote:
> same amount of traffic assuming they are configured to achieve the
> same time interval type checks / responses.

Not necessarily.  With passive you only have to hit the Nagios server
either when there is a change in status, or when your timer expires.  So
you could be checking the service every second, but only contact Nagios
once every 15 minutes.

For active checks, the server has to contact the client for every check.

On the other hand, if your box goes completely down and can't send out a
"help me", Nagios won't know about it until the timer expires.

Then there's hybrid approaches with other offshoots like using slaves where
the slaves do the checks of the resources they own, and then report back up
to the master...  We haven't really explored those yet though.

Sean
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