\n\tAnyone who employs server clusters should have Ganglia monitoring that system. Ganglia can scale to handle clusters with as many as 2,000 nodes.
\n\tNagios includes a vast number of features. You can even set up email, SMS, and printed paper alerts!
\n\tZabbix is a powerful network monitoring tool that offers user-defined views, zooming, and mapping on its Web-based console. It also offers agent-less monitoring, collects nearly ANY kind of data you want to monitor, does availability and SLA reporting, and can monitor up to 10,000 devices.
Jack Wallen is an award-winning writer for TechRepublic, The New Stack, and Linux New Media. He's covered a variety of topics for over twenty years and is an avid promoter of open source. For more news about Jack Wallen, visit his website jackwallen.com.
