Kafka Guarantees

The video tutorial covers the essential guarantees provided by Kafka, focusing on message ordering and replication. It explains how messages are appended to topic partitions in the order they are sent and read by consumers in the same order. The importance of a replication factor is highlighted, allowing producers and consumers to tolerate broker failures. The tutorial also emphasizes maintaining a constant number of partitions to ensure message keys consistently map to the same partition. The session concludes with a recap of these key points.

What is a key guarantee provided by Kafka regarding message handling?

• Messages are stored in random order.

• Messages are appended to a topic partition in the order they are sent.

• Messages are deleted after being read once.

• Messages are stored in reverse order.

What is the role of consumers in Kafka's message ordering guarantee?

• Consumers read messages in reverse order.

• Consumers can read messages in any order.

• Consumers read messages in the order they are stored.

• Consumers can skip messages.

How does Kafka ensure system reliability with a replication factor of 3?

• By allowing all brokers to be down simultaneously.

• By tolerating up to 2 broker failures.

• By tolerating up to 1 broker failure.

• By requiring all brokers to be active at all times.

What happens if the number of partitions for a topic changes?

• The same key will always go to the same partition.

• The topic becomes read-only.

• The key distribution across partitions may change.

• All messages are deleted.

Why is it important to maintain the number of partitions constant in Kafka?

• To store messages in reverse order.

• To allow for unlimited broker failures.

• To enable message deletion after reading.

• To ensure the same key always goes to the same partition.