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 review the list of files we've created. Make sure you have created these files correctly:
   • randomsentence.py
   • splitsentence.py
   • wordcount.py
   • create.py
   • topology.yaml
   • manifest.txt
4. Run the topology with the following command...