Time series databases enable a fundamental step in the central storage and analysis of many types of machine data. As such, they lie at the heart of the Internet of Things (IoT). There’s a revolution in sensor– to–insight data flow that is rapidly changing the way we perceive and understand the world around us. Much of the data generated by sensors, as well as a variety of other sources, benefits from being collected as time series. Although the idea of collecting and analyzing time series data is not new, the astounding scale of modern datasets, the velocity of data accumulation in many cases, and the variety of new data sources together contribute to making the current task of building scalable time series databases a huge challenge. A new world of time series data calls for new approaches and new tools. Time Series Databases