Hacker News: amakhov

New comment by amakhov in "Show HN: T4 – a versioned datastore with branching and time-travel (S3-backed)"

amakhov — Mon, 13 Apr 2026 08:54:48 +0000

Thanks for the feedback! t4 supports etcd API, so basically any etcd client should work in a standalone setup, but yeah, I'm thinking about introducing custom clients for popular languages.

Show HN: T4 – a versioned datastore with branching and time-travel (S3-backed)

amakhov — Sun, 12 Apr 2026 17:22:44 +0000

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 history

I 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!

Comments URL: https://news.ycombinator.com/item?id=47742167

Points: 7

# Comments: 2

New comment by amakhov in "A Tour of Oodi"

amakhov — Sun, 12 Apr 2026 17:01:41 +0000

Well, book collection of the particular library doesn't matter much nowadays since you can order a book online and it will be delivered to your closest library. So it's more like a public space.

New comment by amakhov in "Bring Back Idiomatic Design"

amakhov — Sun, 12 Apr 2026 13:41:23 +0000

... and please stop doing paralax...