how many hosts or services can hold in one nagios?

[Marc Powell]

On Mar 8, 2010, at 9:17 AM, HyunSung Jang wrote:

> hello.
> I am think about setting up distributed monitoring but i just wanna know about how many
> hosts or services  can hold in one nagios server.

There's no simple answer to this question because there are too many variables. An equivalent question is 'How far will a car go on a liter of gas?"

> I have about 1000 hosts in my environment, and 3-5 services for each hosts.
> this makes maximum 5000 services check which i need to setup.

Are these simple checks or complex checks? Are you performing them once a second or once every 24 hours? Are you checking things on a fast LAN or slow WAN? Answering these questions won't get you a definitive answer but does illustrate some of the factors that can affect how many things you can check in a given interval.

> can I make one nagios server to check all this hosts and services? 
> and do you guys think that it is possible?

I expect that if you have a mix of simple (like ping) and complex (like check_http) checks, performed every 5 minutes or so on modern hardware and a decent network, you should be fine. I have single machines checking ~4000 services with 5 minute interval (complex and simple checks) and I appear to have plenty of room to grow.

> if not, how many hosts or services should hold in one nagios servers?
> 
> at this moment i adjusted interval_length to 1 in nagios.cfg and i am using
> 10 sec to check_interval in objects.cfg.

I'd be surprised if you could run 5000 checks every 10 seconds, even if they were just ping (unless just a single ping). It may be possible but you'll have several thousand processes running concurrently all the time.

> Any comments or recommends are appreciated.

I think the best answer anyone can give you is Try And Find Out, given your environment, the checks you want to perform and the frequency you want to perform them.

--
Marc


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