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Overview
Hi, I'm Pierre Zemb. I'm a Senior Engineer building data infrastructure at Clever Cloud. I've built and operated a variety of stateful distributed systems throughout my career.
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Explaining FoundationDB's Architecture Through Compartmentalization
The architecture I couldn't explain One thing always puzzled me about FoundationDB: compared to many distributed databases, its architecture looks almost excessive: GRV proxies, commit proxies, resolvers, log servers, storage servers, and that's only the
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Why Apache Avro Needs Two Schemas
We have been using Apache Avro for years as one of the binary encodings for Materia 's records stored in FoundationDB. A few weeks ago, while writing the code that adds a new type of header for a new component, I made a mistake. I serialized the records,
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Designing Fakes That Prove Correctness
"I'm not going to write a PostgreSQL fake." My last post on why fakes beat mocks and Testcontainers kept coming up in conversations with colleagues, and that sentence was the most common reaction. They are picturing a reimplementation of a query planner,
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BugBash 2026, or how the correctness decade has started
BugBash 2026 was two days in Washington D.C., organized by Antithesis, dedicated to extracting reliable software from the slop factory . The conference brought together thirty speakers from across the correctness landscape: Kyle Kingsbury running a semina
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Why Fakes Beat Mocks and Testcontainers
Your CI pipeline spins up Kafka, Postgres, and Redis in Docker containers. It takes 4 minutes to start. Every test passes. And none of them can simulate the one failure mode that will page you at 3 AM. The problem is not speed or convenience. The problem
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