IDEAS, DECISIONS & LESSONS
Notes on AI, architecture and building useful products.
3 articles
· 4 min read
distributed-systems
Uber's infra team found single-core performance varying by nearly 100% across its roughly 5 million-core fleet. Their fix: stop counting cores, start counting Normalized Compute Units.
Read more· 5 min read
architecture
Uber's error-ownership pattern fixes a bug hiding in almost every service mesh: retries fire at every hop, even when the hop didn't cause the failure. The retry-amplification math explains why, and it's a five-line middleware fix.
Read more· 4 min read
architecture
Uber's fix for retry storms wasn't a smarter backoff algorithm. It was a header that tells every hop in a call chain whether an error actually belongs to it.
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