Master/node to gather and graph "everything" on your systems using Tobi Oetiker's rrdtool. It can optionally warn your surveillance software. This software package was originally called LRRD. The project. Please see http://munin-monitoring.org/
RRFiller provides an easy-to-use solution for logging statistics into an RRDTool database. Designed to complement RRGrapher, the project also provides configurations for creation and updating RRD databases using standard tools like vmstat and netstat.