[metadat]

Does Oracle support anything like this? Or any other DBMS in widespread use, for that matter?

The promise behind this approach to DB sharding has great potential. Simultaneously impressive, novel, and badass.

I wish this had been available ten years ago at a few of my startups!

[isoos]

Depends on the definition of widespread use, but e.g. CockroachDB and YugabyteDB offer scaling of a subset of Postgresql features (and extending on the cluster capabilities).

Nevertheless, Citus is now a promising open source alternative.

[ksec]

Something like Vitess / PlanetScale?

[brightball]

I watched a Citus demo a few months back and it blew me away. I hear upgrades are the big challenge.

[krab]

Not really. It's comparable to a regular Postgres upgrade.

But you can screw it up - see https://github.com/citusdata/citus/discussions/6934

[sokols]

There is Oracle RAC Sharding, but AFAIK it works only at a partition level.