In a recent article on opensource.com, Dan Barker discusses the importance of monitoring in software development and highlights four open source monitoring tools that can help developers track time series data and metrics aggregation. The article notes that there is confusion surrounding the terminology used in monitoring, which has led to the creation of "poor tools" that claim to offer all-in-one solutions. Instead, Barker focuses on time series data and its primary application in metrics aggregation. He profiles the distinctive features of time series data and introduces several tool options, including InfluxDB Time Series Database, a popular open source solution for storing and managing time series data.