Apr 12, 2026
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Hi HN,I built t4, a datastore that stores its WAL and snapshots in S3.Instead of traditional storage, it writes append-only segments to object storage and reconstructs state from checkpoints + WAL.A side effect of this model is that the database becomes naturally versioned: you can restore any past state, branch from any point (with copy-on-write) and replay historyI started this as an experiment to replace etcd in Kubernetes, but it’s evolving into a general-purpose versioned state store.Curious what people think about it and appreciate any feedback!
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