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Apache Kafka Use Case Examples
Case 1. One producer and one consumer
Create one topic testbin/Kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic Hello-KafkaRun the broker bin/Kafka-console-producer.sh --broker-list localhost:9092 --topic Hello-KafkaWrite your message Run the consumerbin/Kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test --from-beginningYou will get the message from producer
let's expand our cluster to 2 nodes (still all on our local machine)cp config/server.properties config/server.propertiescp config/server.properties config/server-one.propertiesNow edit these new files and set the following properties:config/server-one.propertiesWe already have Zookeeper and our single node started, so we just need to start the two new nodes bin/Kafka-server-start.sh config/server-one.propertiesNow create a new topic with a replication factor of three: bin/Kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 2 --partitions 1 --topic Multibrokerapplicationbin/Kafka-topics.sh --describe --zookeeper localhost:2181 --topic Multibrokerapplicationbin/kafka-console-producer.sh --broker-list localhost:9092 --topic Multibrokerapplicationbin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --from-beginning --topic Multibrokerapplication