Posts, papers, videos and talks on software engineering, data engineering and AI.https://datafacttree.com/https://datafacttree.com/research/deadlocks-hot-sql-server-tables/https://datafacttree.com/research/deadlocks-hot-sql-server-tables/A production incident, a deadlock graph, and the composite and covering indexes that made it stop.Tue, 22 Sep 2026 00:00:00 GMThttps://datafacttree.com/research/paper-secure-smart-lock-mqtt/https://datafacttree.com/research/paper-secure-smart-lock-mqtt/IEEE conference paper on a smart-lock system built on MQTT, covering the protocol choice, the security design and the measured request-response cycle.Fri, 01 Jul 2022 00:00:00 GMT