How to seed RRDtool from file with timestamps?

Question

I have a file with timestamps for hits on a system. How can I feed this into the RRDtool database (or other similar solution), so that I can plot a time graph?

Answer 1

Use an ABSOLUTE type datasource and for every event you see do a

rrdtool update log.rrd N:1

If you want to track different events, have multiple rrd files. You can then pull them all together into a single graph.