Hello everyone! I'm a student and, in my ATSE class, me and my team have to find an open source project and search for its maintenance measurements, activities and techniques. We searched through your documentation, but we couldn't find what we were looking for. Can you tell us more about how you maintain Elasticsearch and how do you measure that maintenance?
https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-upgrade.html
https://www.elastic.co/guide/en/elasticsearch/guide/master/_rolling_restarts.html
But I am not sure how you measure maintenance.