https://josedavidbaena.com Personal website and blog where I document thoughts, ideas, and interests in software engineering, web performance, and open source technologies. en-us josedab@gmail.com (José David Baena) josedab@gmail.com (José David Baena) Sun, 26 Jul 2026 00:00:00 GMT https://josedavidbaena.com/blog/kafka-protocol-internals/02-fetch-sessions-performance https://josedavidbaena.com/blog/kafka-protocol-internals/02-fetch-sessions-performance How KIP-227 replaces repeated per-partition Fetch metadata with session deltas, what state that creates, and where the optimization stops paying. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadistributed-systemsprotocolconsumersperformance https://josedavidbaena.com/blog/kafka-protocol-internals/04-producer-idempotence-transactions https://josedavidbaena.com/blog/kafka-protocol-internals/04-producer-idempotence-transactions How producer IDs, epochs, sequences, fencing, and transaction markers make Kafka retries safe—and where exactly-once semantics stop. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadistributed-systemsprotocolidempotencetransactions https://josedavidbaena.com/blog/kafka-protocol-internals/07-quotas-throttling https://josedavidbaena.com/blog/kafka-protocol-internals/07-quotas-throttling Kafka quotas contain noisy neighbors through versioned throttle responses, broker-side channel muting, and per-broker resource accounting. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadistributed-systemsprotocolperformancemulti-tenant