A couple of weeks ago at Gophercon, a few of us got together at a table to discuss time series databases. Specifically, we were interested in talking about time series storage. The group included Jason Moiron (@jmoiron), Paul Dix (@pauldix), Ben Johnson (@benbjohnson), Julius Volz (@juliusvolz), and others representing companies and projects such as Datadog, InfluxDB, and Prometheus, just to name a few. I was representing VividCortex. What follow are observations about each group’s time series storage problem and some approaches that they’re taking (or have taken) in order to solve it.