[jitl]

> The broker runs a single group commit loop on behalf of all clients, so no one contends for the object. Critically, it doesn't acknowledge a write until the group commit has landed in object storage. No client moves on until its data is durably committed.

[aduffy]

Yea, the group commit is the real insight here.

I read this blog post and to help wrap my head around it I put together a simple TCP-based KV store with group commit, helped make it click for me.

https://github.com/a10y/group-commit/