Right now the Elastic-Stack (also known as ELK-Stack) is an increasingly used tool to realize BI- and Big-Data projects covering the whole challenges from the ETL-process to the graphical visualization. In one of our projects at the „Digitallab“ OC|Lab we were analyzing Logfiles, trying to improve the readability of the logs and gathering new knowledge within the data. For these tasks we used the powerful Stack. The Stack is divided in three parts: Logstash, Elasticsearch…