May 2017
Intermediate to advanced
294 pages
7h 33m
English
Content preview from Apache Spark 2.x Cookbook
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Streaming using Kafka
Kafka is a distributed, partitioned, and replicated commit log service. In simple words, it is a distributed messaging server. Kafka maintains the message feed in categories called topics. An example of a topic can be the ticker symbol of a company you would like to get news about, for example, CSCO for Cisco.
Processes that produce messages are called producers and those that consume messages are called consumers. In traditional messaging, the messaging service has one central messaging server, also called the broker. Since Kafka is a distributed messaging service, it has a cluster of brokers, which functionally acts as one Kafka broker, as shown here:
For each topic, Kafka maintains the partitioned log. This partitioned ...
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