This week, how AWS hits 1 petabyte per second on old HDDs, why a DNS bug killed Slack for 14 hours, and how to build a key-value database from scratch.

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Architecture Notes

A curated collection of articles covering AWS S3's petabyte-scale architecture using commodity HDDs, a DNS race condition that caused a 14-hour AWS outage affecting Slack and Signal, building key-value databases from scratch with LSM trees, AI's impact on programming identity and career development, HTTP caching strategies, and practical approaches to building effective AI agents. Includes open-source projects for deployment platforms and grammar checking tools.

Arc Notes Weekly #101: Generator