2021
Bogdanovskiy - Kafka Fundamentals of 49:22
    https://www.youtube.com/watch?v=-AZOi3kP9Js
2018
https://medium.com/@durgaswaroop/a-practical-introduction-to-kafka-storage-internals-d5b544f6925f
    https://habr.com/ru/company/southbridge/blog/535374/