How many hosts and services are you monitoring with Nagios?

[Max Schubert]

Hi,

I like it when people periodically post numbers and architecture
summaries, I am guessing with the distributed frameworks out now for
Nagios this thread might be seeing bigger numbers than past threads
have.

With our custom-built distributed Nagios-based monitoring system, we
are currently monitoring 18000+ hosts every 5 minutes and 100k+ active
services (plenty of passive services in addition to the actives) every
5 mins as well.  We collect performance data from every check as well
and pass that on to a highly distributed and scalabe time-series data
warehouse another team in our organization has built (which is why we
have the 5 min interval requirement)

We also do trap ingest using SNMPTT with a few custom mods, but not
going to include those numbers as they never have required the
optimizations the polling has required.

This isn't a monolithic instance, we have 6 projects using instances
of our distributed Nagios-based software, called Racon (soon my
manager will give our team to package it as open source - so I hear at
least).  We built it on core Nagios with a custom database layer based
on a very very early version of Merlin's database abstraction layer
(thank you Andreas!) - we have a custom client/server network-based
notification framework in use (we will release that as well) along
with a custom NEB/perl based client-server framework (also releasable,
just need time scheduled) for sending and processing performance data
- the performance and notification framework are both horizontally
scalabe and network fault tolerant.

What kinds of numbers of hosts and services are you all monitoring?
Which add-ons / distributed frameworks are you using?

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