August 2017
Beginner to intermediate
284 pages
6h 51m
English
Content preview from Mastering Apache Storm
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Replication
Kafka supports the replication of partitions of topics to support fault tolerance. Kafka automatically handles the replication of partitions and makes sure that the replica of a partition will be assigned to different brokers. Kafka elects one broker as the leader of a partition and all writes and reads must go to the partition leader. Replication features are introduced in Kafka 8.0.0 version.
The Kafka cluster manages the list of in sync replica (ISR)--the replicate which are in sync with the partition leader into ZooKeeper. If the partition leader goes down, then the followers/replicas that are present in the ISR list are only eligible for the next leader of the failed partition.
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