This is an interesting article on how a 300 node cluster was built, using FreeBSD. A nice bonus with the article is that it has a list of major vendor that work with FreeBSD. Elsewhere, if you ever wanted to graph your network traffic, disk usage, system load, or anything else about your network, servers or workstations, then RRDTool is your best friend and SNMP is it’s very sexy spouse. Between the two you can collect data on almost element in your network, either local or remote, and graph it almost any way you want. Read the paper here.