Personal site of Fu Lim — projects, career, and writing about how software works.https://fulim.tech/enhttps://fulim.tech/blog/hello-world/https://fulim.tech/blog/hello-world/This is an ordinary Post. It is a plain markdown file, and it fetches no JavaScript at all — the only scripts are a few hundred bytes inlined in the page, for the theme and the code-block copy buttons.Sun, 02 Aug 2026 00:00:00 GMTmetahttps://fulim.tech/blog/what-kafka-actually-guarantees/https://fulim.tech/blog/what-kafka-actually-guarantees/"Exactly once" is doing a lot of work in that sentence. A short tour of the guarantees Kafka really makes, and the three places teams assume more.Sat, 18 Jul 2026 00:00:00 GMTkafkadistributed systems