How to scale the performance of nagios

[Andreas Ericsson]

On 06/10/2011 09:24 PM, Manish Kumar wrote:
> Hello Friends,
> 
> 
> I have just implemented this nagios-3.2.3 solution to monitor a large client
> infrastructure, i have to monitor say around 200 network switches for around
> 20 services in each switch and some linux servers around 10 services, and
> many windows servers with around 6 services to monitor. I have put the
> configuration for all these in the various config files of nagios like
> switch.cfg for switches, localhost.cfg for linux servers, windows.cfg for
> windows servers. So infact the config files have grown very large in size.
> 
> I have a single stand alone implementation of nagios server i.e single
> nagios server monitoring entire IT infrastructure of the client(not the
> distributed one).
> 
> I want to know this thing that, is it very normal for the standalone
> implementation of nagios to monitor the size of infrastructure that i have
> mentioned quite efficiently without any delay in the alerts and
> notifications. Since i am monitoring very critical network elements any
> delay in the host/service failure notification will harm us.
> What i have observed is that nagios has become slow in sending notifications
> and there is delay in sending a notification on actual failure of a critical
> host/service. Is nagios is not very fast in doing the service checks for all
> these around 300 hosts and 300*15 approx. services very fastly, efficiently
> and reliably. It is a very worst thing that a critical network
> element/service has got down now and we are getting the notification for the
> same after a delay of say 5 minutes.
> 
> 
> How to scale the performance of my implementation of nagios(on fedora 14) so
> that it should be reliable. What is the difference between active checks and
> passive checks. will it be useful to enable passive checks for all these
> instead of active check to increase the performance and will it be reliable.
> if yes how we can enable the same.
> 
> Any help will indeed be helpful to me and others in situations like me...
> :)
> 

First off; 300 hosts is not very large in terms of networks, but if you
try to run Nagios on hardware from 1992 you'll definitely have serious
issues managing even that.

As for your other questions, I'd say you have a lot of reading to do.
Start out with the official nagios documentation and keep looking for
answers to all new questions that crop up. When you have a few very
specific questions that you can no longer find the answers for in the
docs, come back here and ask those specific questions again.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

Considering the successes of the wars on alcohol, poverty, drugs and
terror, I think we should give some serious thought to declaring war
on peace.

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