September 2018
Intermediate to advanced
398 pages
9h 43m
English
Content preview from Scala Programming Projects
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Topics, partitions, and offsets
In order to process the messages exchanged between the producers and the consumer, Kafka defines three main components—topics, partitions, and offsets.
A topic groups messages of the same type for streaming. It has a name and a number of partitions. You can have as many topics as you want. As Kafka can be distributed on multiple nodes, it needs a way to materialize the stream of messages on these different nodes. This is why the message stream (topic) is split into multiple partitions. Each partition contains a portion of the messages sent to a topic.
Each node of the Kafka cluster manages several partitions. A given partition is assigned to several nodes. This avoids losing data if a node is lost, and allows ...
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