Book Image

Mastering Apache Storm

By : Ankit Jain
Book Image

Mastering Apache Storm

By: Ankit Jain

Overview of this book

Apache Storm is a real-time Big Data processing framework that processes large amounts of data reliably, guaranteeing that every message will be processed. Storm allows you to scale your data as it grows, making it an excellent platform to solve your big data problems. This extensive guide will help you understand right from the basics to the advanced topics of Storm. The book begins with a detailed introduction to real-time processing and where Storm fits in to solve these problems. You’ll get an understanding of deploying Storm on clusters by writing a basic Storm Hello World example. Next we’ll introduce you to Trident and you’ll get a clear understanding of how you can develop and deploy a trident topology. We cover topics such as monitoring, Storm Parallelism, scheduler and log processing, in a very easy to understand manner. You will also learn how to integrate Storm with other well-known Big Data technologies such as HBase, Redis, Kafka, and Hadoop to realize the full potential of Storm. With real-world examples and clear explanations, this book will ensure you will have a thorough mastery of Apache Storm. You will be able to use this knowledge to develop efficient, distributed real-time applications to cater to your business needs.
Table of Contents (19 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback

The different options of the Storm topology

This section covers the following operations that a user can perform on the Storm cluster:

  • Deactivate
  • Activate
  • Rebalance
  • Kill
  • Dynamic log level settings


Storm supports the deactivating a topology. In the deactivated state, spouts will not emit any new tuples into the pipeline, but the processing of the already emitted tuples will continue. The following is the command to deactivate the running topology:

$> bin/storm deactivate topologyName

Deactivate SampleStormClusterTopology using the following command:

bin/storm deactivate SampleStormClusterTopology

The following information is displayed:

0 [main] INFO backtype.storm.thrift - Connecting to Nimbus at localhost:6627 76 [main] INFO backtype.storm.command.deactivate - Deactivated topology: SampleStormClusterTopology


Storm also the supports activating a topology. When a topology is activated, spouts will again start emitting tuples. The following is the command to activate the topology: