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[ashish]

1.How to create Centralized Nagios Server??

2.What is the maximum limit for a Nagios Server-Clients for given H/W
2-Core CPU @ 2.7 MHz., 4-GB RAM, 300 GB HDD on SAN,

3.What is the excat ideal configuration for a Nagios Server.

Regards,
Ashish Singh
+91-99-3060-2888

[mguthrie]

1.How to create Centralized Nagios Server??

Here's a recently updated Doc on distributed monitoring options with Nagios.
http://library.nagios.com/library/produ ... for-nagios

2.What is the maximum limit for a Nagios Server-Clients for given H/W
2-Core CPU @ 2.7 MHz., 4-GB RAM, 300 GB HDD on SAN,

This is always a tough one to answer, because the performance load on a server can have HUGE variation depending on how it's set up and what you're monitoring. We generally recommend capping a single server at around 10000 services, but again, depending on what checks you're running, and if they're active or passive, that number can change a substantial amount. Monitoring bandwidth for switches, for example, takes a lot more CPU than a simple ping check. I also know some people running Nagios core with over 15000 services running, but I don't know what they had for hardware. Here's a doc to tuning a Core server.

http://nagios.sourceforge.net/docs/3_0/tuning.html