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Building Python Real-Time Applications with Storm by Barry Hart, Kartik Bhatnagar

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Storm-topology-specific terminologies

A topology is a logical separation of programming work into many small-scale processing units called spout and bolt, which is similar to MapReduce in Hadoop. A topology can be written in many languages, including Java, Python, and lot more supported languages. In visual depictions, a topology is shown as a graph of connecting spouts and bolts. Spouts and bolts execute tasks across the cluster. Storm has two modes of operation, called local mode and distributed mode:

  • In local mode, all processes of Storm and workers run within your code development environment. This is good for testing and development of topologies.
  • In distributed mode, Storm operates as a cluster of machines. When you submit topology code to ...

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