Many Nagios folks use PNP4nagios to store performance data and draw graphs.
Nowadays time series databases like Influxdb are quite trendy and have their own pros and cons. But In the end
they visualize the stored metrics with Grafana which comes with a plugable
datasource api, so wouldn’t it be nice to use the already collected RRD data in Grafana as well? This
combines the speed of rrd with the more modern graphs from Grafana.