Storm Management and Maintenance - Real-time Analytics with Storm and Cassandra - page 203

Quiz time
Q.1. State whether the following statements are true or false:
1. Storm nodes can't be added to the cluster with topologies being executed.
2. A topology can't survive the Storm node failure.
3. Storm logs are created on each node in the cluster.
4. The location of the Storm log creation is configurable.
Q.2. Fill in the blanks:
1. _______________ is the heartbeat tracker of the cluster.
2. _______________ is the daemon that's mandatory for topology submission and re-
balancing.
3. The ___________ file holds the worker configuration for the topology.
Q.3. Execute the following use cases to see the internals of Storm:
1. Start nimbus and check nimbus.log to see what a successful startup should look
like.
2. Start the supervisor and check Supervisor.log to see what a successful star-
tup should look like.
3. Submit the topology, say a simple WordCount topology, and figure out the
worker.log file creation.
4. Update log4j.properties to change the logging level and verify its impact.