RRDtool vs Sensu: What are the differences?
RRDtool: High performance data logging and graphing system for time series data. RRDtool lets you log and analyze the data you gather from all kinds of data-sources (DS). The data analysis part of RRDtool is based on the ability to quickly generate graphical representations of the data values collected over a definable time period; Sensu: Open source monitoring framework. A monitoring framework that aims to be simple, malleable, and scalable. Essentially, Sensu takes the results of “check” scripts run across many systems, and if certain conditions are met; passes their information to one or more “handlers”. Checks are used, for example, to determine if a service like Apache is up or down.
RRDtool and Sensu can be categorized as "Monitoring" tools.
"Do one thing and do it well" is the primary reason why developers consider RRDtool over the competitors, whereas "Support for almost anything" was stated as the key factor in picking Sensu.
RRDtool and Sensu are both open source tools. It seems that Sensu with 2.96K GitHub stars and 389 forks on GitHub has more adoption than RRDtool with 571 GitHub stars and 199 GitHub forks.