What is Kafka’s data persistence mechanism?

Kafka’s data persistence mechanism is achieved by persisting messages on disk. Kafka ensures messages are written to log files on disk before being transmitted, guaranteeing their persistence before reaching consumers. This allows for message recovery by reading data from disk in case of unexpected issues during transmission. Additionally, Kafka supports data backup and replication to ensure high reliability and fault tolerance. This persistence mechanism ensures reliable message transmission and persistent data storage in Kafka.