Building Python Real time Applications with Storm

Running the topology

Just a few more details and we'll be ready to run the topology:

1. Create a topology.yaml file. This is a configuration file for Storm. A complete explanation of this file is beyond the scope of this book, but you can see the entire set of available options at https://github.com/apache/storm/blob/master/conf/defaults.yaml:

   nimbus.host: "localhost"
   topology.workers: 1

2. Create an empty manifest.txt file. You can use an editor to do this or simply run touch manifest.txt. This is a Petrel-specific file that tells Petrel what additional files (if any) should be included in the .jar file that it submits to Storm. In Chapter 4, Example Topology – Twitter we'll see an example that really uses this file.
3. Before running the topology, let's ...