Good video on testing performance of elasticsearch

https://www.elastic.co/elasticon/conf/2018/sf/the-seven-deadly-sins-of-elasticsearch-benchmarking

Very good video about migration from the Amazon ES service to a self-managed cluster (with all concerns, reasons and hard decisions behind described well). Sometimes I had the feeling like that guy is telling my story.
https://www.elastic.co/elasticon/conf/2018/sf/lyfts-wild-ride-from-amazon-es-to-self-managed-elasticsearch