What is RRD?
RRD – Round Robin Database
Developed by Tobi Oetiker
Tracks variable over time (min, max, avg, last)
Fixed dBase size after creation because data ‘drops’ out of
dBase (‘circle analogy’)
Database definitions cannot be changed later and one cannot go
back in time if data is missing
Round Robin Archives also defined in the dBase relate to
different time periods, e.g. daily, weekly, monthly, yearly
Longer time periods will naturally have lesser resolution
RRDTool is used to insert data into RRD and plot graphs
http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/index.html