continuous query

In a previous blog post I wrote about collecting server statistics with Collectd, passing them to InfluxDB and graphing them with Grafana. Using “Retention Policies” (RPs) and “Continuous Queries” (CQs) metrics could be downsampled to reduce storage usage. This blog post shows how to do the same with InfluxDB v2. InfluxDB v2 At the end of 2020 InfluxDB v2 was released. Moving to InfluxDB v2 with the setup I had (Collectd input, downsampling) came with some challenges:...

Almost 10 years ago I started developing a web frontend for collectd, Collectd Graph Panel (CGP). A PHP frontend that displays graphs in PNG format using rrdtool and the RRD files created by collectd. A lot has happened since then. Because of the IoT hype time series databases like Graphite, InfluxDB and TimescaleDB became more popular. Also visualization tools gained more traction, of which Grafana is the most popular one....