Book Image

Apache Kafka 1.0 Cookbook

By : Alexey Zinoviev, Raúl Estrada
Book Image

Apache Kafka 1.0 Cookbook

By: Alexey Zinoviev, Raúl Estrada

Overview of this book

Apache Kafka provides a unified, high-throughput, low-latency platform to handle real-time data feeds. This book will show you how to use Kafka efficiently, and contains practical solutions to the common problems that developers and administrators usually face while working with it. This practical guide contains easy-to-follow recipes to help you set up, configure, and use Apache Kafka in the best possible manner. You will use Apache Kafka Consumers and Producers to build effective real-time streaming applications. The book covers the recently released Kafka version 1.0, the Confluent Platform and Kafka Streams. The programming aspect covered in the book will teach you how to perform important tasks such as message validation, enrichment and composition.Recipes focusing on optimizing the performance of your Kafka cluster, and integrate Kafka with a variety of third-party tools such as Apache Hadoop, Apache Spark, and Elasticsearch will help ease your day to day collaboration with Kafka greatly. Finally, we cover tasks related to monitoring and securing your Apache Kafka cluster using tools such as Ganglia and Graphite. If you're looking to become the go-to person in your organization when it comes to working with Apache Kafka, this book is the only resource you need to have.
Table of Contents (18 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Dedication
Preface

Modifying message topics


Once created, topics can be modified. For example, when a new node is added to the cluster or a different parallelism is needed. Sometimes, deleting the topic and starting over is not the correct solution.

Getting ready

For this recipe, Kafka must be installed, ZooKeeper should be running, and the broker should be running with some topics created on it.

How to do it...

  1. Run the following command from the Kafka installation directory:
$ bin/kafka-topics.sh --zookeeper localhost:2181/chroot --alter --topic test-topic --partitions 40 --config delete.retention.ms=10000 --delete-config retention.ms

This command changes the delete.retention.ms to 10 seconds and deletes the configuration retention.ms

Note

Kafka does not support reducing the number of partitions for a topic.

There is the kafka-configs shell; the syntax to add and remove is as follows:

  1. To add a config to a topic, run the following:
$ bin/kafka-configs.sh --zookeeper host:port/chroot --entity-type topics --entity-name...