setting of Kafka
Number of Partitions >= Number of Instance Transmission Warranty - Adjust to suit the Client's requirements At Most Once Retransmission X, Duplicate deletion X At Least Once: Retransmission O, Duplicate deletion X Exactly Once: Retransmission O, Duplicate deletion O Offset Commit: Adjust to suit the Client's requirements Auto Offset Commit Manual Offset Commit commitSync commitAsync Offset is managed by Consumer Group one message can be consumed to the same value in another Consumer group, but only once within the same Consumer Group. Producer processing method Synchronous Asynchronous server.properties unclean.leader.election.enable True: Expelled from the ISR, but automatically becomes the leader when it comes to life first. False: Waiting for the last leader to come to alive Enable connectivity only from internal clients listeners = PLAINTEXT://{private IP}:9092 advertised.listeners= PLAINTEXT://{private IP}:9092 Enable connectivity only from external clients listeners=PL
