Partition vs Replication

https://dzone.com/articles/kafka-topic-architecture-replication-failover-and

https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.6.4/bk_kafka-component-guide/content/ch_create-kafka-topic.html

Youtube:

https://www.youtube.com/watch?v=udnX21__SuU

Produce Record

ProduceRecord constructor contains Topic, Key and Value.

AProducerRecordcontains a key (K) and a value (V). The value is the payload of your message (unlike in JMS there is noMessageconstruct that allows you to send additional message metadata). The key is a business value provided by you that is used to shard your messages across the partitions.