DSQL uses an internal service, Journal[1], for its mutli-region writes.

[1]: https://www.allthingsdistributed.com/2025/05/just-make-it-sc...

It's definitely DSQL with the multi-region active active feature[1].

[1]https://aws.amazon.com/rds/aurora/dsql/features/#topic-1

DSQL only uses Postgres for the query processor layer, so it doesn't require a replication library within postgres itself. Definitely NOT from DSQL.

> We’re not using any of the storage or transaction processing parts of PostgreSQL, but are using the SQL engine, an adapted version of the planner and optimizer, and the client protocol implementation. [1]

Rather, DSQL seems to do its region replication using the distributed journal abstraction [2].

[1] https://brooker.co.za/blog/2024/12/04/inside-dsql.html [2] https://brooker.co.za/blog/2024/12/06/inside-dsql-cap.html

I thought dsql was distributed transactions. :thinking:

DSQL does use distributed transactions to offer active-active alongside strong consistency and isolation guarantees. Here's how: https://brooker.co.za/blog/2024/12/05/inside-dsql-writes.htm...