Brokers

- A Kafka cluster is composed of multiple brokers(servers)

- Each broker is identified with its ID(integer)

- Each broker contains certain topic partitions

- After connectiong to any broker (called a bootstrap broker), you will be connected to the entire cluster

- A good number to get started is 3 brokers, but some big clusters have over  100 brokers

- In these examples we choose to number brokers starting at 100(arbitrary)