ksqlDB Architecture and Scalability

This chapter discusses the architecture of ksqlDB and how it uses Kafka as the commit log, materializes tables, and stores data in rocks db. It emphasizes the scalability of ksqlDB and its ability to add or remove nodes from the cluster. The chapter also highlights the importance of making Kafka a multi-tenant system and concludes with a discussion on the lack of support for secondary indexes in ksqlDB.