How does Kafka handle message ordering and partition assignment?
The question is about Apache Kafka .
Kafka guarantees message order within a single partition-messages produced to the same partition are consumed in the exact sequence they were written. Across multiple partitions, order is not guaranteed. Producers assign messages to partitions using a partition key-messages with the same key always route to the same partition, ensuring ordered processing for related events such as all transactions from a single user.
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