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To run commands on your dozone cluster cluster please ssh into the datanode.

docker-compose exec datanode bash

Now we can run oz command shell or corona. Here is an example of running corona the load generator for ozone. 

The following command creates a volume, ten buckets and writes one hundred keys to each bucket using corona.

cd hadoop/bin
./hdfs corona -mode offline -validateWrites -numOfVolumes 1 -numOfBuckets 10 -numOfKeys 100

You can check the KSM UI to see the activity generated by corona.

http://localhost:9874/

While you are there, please check out the Ozone documentation.