An ecommerce website maintains two topics - a high volume "purchase" topic with 5 partitions and low volume "customer" topic with 3 partitions. You would like to do a stream-table join of these…

The correct answer is C. Model customer as a GlobalKTable. In case of KStream-KStream join, both need to be co-partitioned. This restriction is not applicable in case of join with GlobalKTable, which is the most efficient here.

Developing with Kafka Streams

Question

An ecommerce website maintains two topics - a high volume "purchase" topic with 5 partitions and low volume "customer" topic with 3 partitions. You would like to do a stream-table join of these topics. How should you proceed?

Options

ARepartition the purchase topic to have 3 partitions
BRepartition customer topic to have 5 partitions
CModel customer as a GlobalKTable
DDo a KStream / KTable join after a repartition step

How the community answered

(27 responses)

A
4% (1)
B
26% (7)
C
59% (16)
D
11% (3)

Explanation

In case of KStream-KStream join, both need to be co-partitioned. This restriction is not applicable in case of join with GlobalKTable, which is the most efficient here.

Topics

#GlobalKTable#stream-table join#co-partitioning#Kafka Streams topology

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