Distributed Systems006

The Pile Drained. order-9912 Was Reserved Twice.

Lag hit zero. Packing still paged. Inventory had reserved the same order twice.

Oct 10, 2026·5 min read

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Distributed Systems005

The Deploy Paused Inventory. Orders Piled Up.

Inventory went green. Checkout never stopped. Two hundred orders were already in the log, and nobody had read them.

Oct 01, 2026·4 min read

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Distributed Systems004

Kafka Consumer Groups & Replay

Two teams read the same OrderPlaced events without stealing — then reset an offset and fix a bad stock reservation from the log.

Sep 17, 2026·7 min read

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Distributed Systems003

Your First Kafka Producer and Consumer

Docker up, one topic, one OrderPlaced message — produce, consume, then watch the log survive when the consumer is down.

Sep 10, 2026·6 min read

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Distributed Systems002

Kafka Core Vocabulary — Broker, Topic, Partition, Offset

Follow one OrderPlaced event from write to read — broker, topic, partition, and offset in plain English, with interactives.

Sep 01, 2026·5 min read

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Distributed Systems001

Why Kafka Exists

What problem Kafka solves — durable logs, decoupled services, and replay — and when a simple HTTP call is still the right answer.

Aug 29, 2026·5 min read

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