What Is Kstream in Kafka

KStream is an abstraction of a record stream of KeyValue pairs, i.e., each record is an independent entity/event in the real world. For example a user X might buy two items I1 and I2, and thus there might be two records <K:I1>, <K:I2> in the stream.

What is difference between KStream and KTable?

KStream handles the stream of records. On the other hand, KTable manages the changelog stream with the latest state of a given key. Each data record represents an update.

What is a Kafka KTable?

A KTable is either defined from a single Kafka topic that is consumed message by message or the result of a KTable transformation. An aggregation of a KStream also yields a KTable .