•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
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