The hook, for me, was a few paragraphs in:

> We tested this approach for a CDN use case and found that a 4-node Citus database cluster can simultaneously:

> - Ingest and aggregate over a million rows per second

> - Keep the rollup table up-to-date within ~10s

> - Answer analytical queries in under 10ms.

The example sounds pretty similar to Cloudflare's old pipeline:

https://blog.cloudflare.com/scaling-out-postgresql-for-cloud...

Isnt there a race condition ? you get the sequence before acquiring a lock.