What non-functional tests can be performed with Kafka?

Non-functional tests for Kafka include:

• Performance Testing: measuring throughput, latency during message publishing and consumption.
• Stress Testing: testing system behavior under high loads, peak message volumes.
• Reliability Testing: checking resilience to failures, such as broker or network outages.
• Scalability Testing: assessing how Kafka behaves when adding new brokers and increasing the number of partitions.
• Fault Tolerance Testing: testing recovery after failures, data replication.
• Security Testing: verifying authentication, authorization, data encryption.

For example, you can load Kafka with a large number of messages and measure delivery latency, check that the system continues to operate without data loss when one broker is disconnected.