January 2018
Intermediate to advanced
336 pages
7h 56m
English
Content preview from Microservices with Clojure
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Design principles
Kafka is run as a cluster of one or more servers that act as message brokers (https://en.wikipedia.org/wiki/Message_broker) in the system. Kafka categorizes the stream of records under topics that are used by producers and consumers to produce records and consume them, respectively. Each record consists of a key-value pair and a timestamp.
A typical Kafka cluster is shown in the following diagram along with the structure of a Kafka topic and its partitions. A topic is a core abstraction for a stream of records in Kafka. Producers publish the records to a topic that can have zero, one, or more consumers subscribed to it. Each topic consists of one or more partitions that are ordered, immutable sequence of records that is ...
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