Kafka topic record

1. Create topic

 ./kafka-topics.sh --create --zookeeper ip:port --replication-factor 1 --partitions 2 --topic my-topic

among --replication-factor Number of configured replicas, --partitions Configure the number of partitions

2. View topic details

 ./kafka-topics.sh --describe --zookeeper ip:port --topic my-topic

3. List all topics

 ./kafka-topics.sh --list --zookeeper ip:port

4. Delete topic

 ./kafka-topics.sh --delete --zookeeper ip:port --topic my-topic

5. Modify the duration of topic saving messages

 ./kafka-configs.sh --zookeeper ip:port --alter --entity-type topics --entity-name   my-topic --add-config retention.ms=172800000

retention.ms=172800000 Configured for retention for 2 days

6. Increase the number of topic partitions

 ./kafka-topics.sh --alter --zookeeper ip:port  --topic my-topic --partitions 3

The number of extended partitions can only be increased, not decreased. If you want to reduce the number of partitions, you can only delete the original topic and rebuild it.

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