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/01-wire-protocol-compatibility https://josedavidbaena.com/blog/kafka-protocol-internals/01-wire-protocol-compatibility How Kafka frames requests, versions schemas, negotiates broker capabilities, and evolves fields without requiring clients and brokers to upgrade together. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadistributed-systemsprotocolscompatibility 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/03-request-lifecycle https://josedavidbaena.com/blog/kafka-protocol-internals/03-request-lifecycle Trace a Kafka request through the broker's real thread and queue model, then diagnose p99 latency against a healthy baseline before changing knobs. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadistributed-systemsperformancelatencyinternals 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/05-replication-durability https://josedavidbaena.com/blog/kafka-protocol-internals/05-replication-durability How ISR, high watermarks, leader epochs, and eligible replicas let Kafka prove which committed history may lead after failure. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadistributed-systemsreplicationprotocols https://josedavidbaena.com/blog/kafka-protocol-internals/06-compression-decisions https://josedavidbaena.com/blog/kafka-protocol-internals/06-compression-decisions A measurement-driven guide to Kafka compression across CPU, network, storage, and latency, using real payloads instead of codec folklore. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkacompressionzstdlz4performance 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 https://josedavidbaena.com/blog/debugging-kafka-protocol-11-messages-become-1 https://josedavidbaena.com/blog/debugging-kafka-protocol-11-messages-become-1 How a missing 8-byte write in a Kafka protocol implementation turned 11 messages into 1—with zero errors, zero warnings, and complete silent data loss. Fri, 12 Dec 2025 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadebuggingprotocolsrustdistributed-systemsstreaming