Working with AWS EMR has a lot of benefits. But when it comes to metrics, AWS currently does not supply a proper solution for collecting cluster metrics from EMRs. Well, there is AWS Cloudwatch of course, which works out of the box and gives you loads of EMR metrics. The problem with CloudWatch is that it doesn’t give you the ability to follow metrics per a business unit, or a tag, only per a specific EMR id. This simply means you can not compare the metrics over time, only for specific EMRs. Let me explain again the problem. A common use of EMR, is that you write some kind of code that will be executed inside an EMR, and will be triggered every given amount of time, lets say every 5 hours. This means that every 5 hours a new EMR, with a new ID will be spawned. In CloudWatch you can see each of these EMRs individually but not in a single graph, which is defiantly a disadvantage. Just to note, I am referring only to machine metrics, like memory, cpu and disk. Other metrics like jvm metrics or business metrics, are usually collected by the process itself and Continue reading How to properly collect AWS EMR metrics?