Prometheus
Prometheus (https://prometheus.io) is an open-source service monitoring system, based on time series database that implements a highly dimensional data model. A time series entry is identified by a metric name and a set of key-value pairs. Prometheus has a sophisticated local storage subsystem, which is dealing with data on disk and relies on the disk caches of the operating system for optimal performance. Prometheus server is responsible for collecting the data and communicating with the time-series database for retrieving data upon request.
