Best OpenSource Monitoring Tool? [closed]

I'm trying to decide between Zenoss and GroundWork. I need an enterprise level monitoring tool and I had heard really good comments of these tools.

Do any of you have implemented them? Which are their strong points? Shortcomings?

Solution 1:

Zabbix, it's really good. Previously we used Nagios, MRTG, Munin but Zabbix kind of mix the functionality of the previous ones, letting you know when the server is down but also:

• Web Administration (PHP + MySQL): One of the worst points of Nagios is its configuration, being almost all in config files... Its OK if you have to monitor 5 machines, but what if you have 400?
• Several types of monitoring: Have a native agents for almos every OS, but also lets you monitor through SNMP, IPMI, scripts, etc.
• Graphs and Maps: I love them! Like MRTG, but MUCH easier to configure.

Solution 2:

Specifically in regards to availability monitoring, I'm a huge Nagios fan. If you haven't considered it, I'd strongly recommend it. Others like monit.