In T375470#10170498, @Ladsgroup wrote:

Turning MW's database to a distributed one is not really technically feasible. It's basically something along the lines of "rewrite mw to golang" in terms of amount of resources needed.

Really?
Do you know about MySQL Cluster?

"MySQL NDB Cluster is the distributed database combining linear scalability and high availability. It provides in-memory real-time access with transactional consistency across partitioned and distributed datasets. It is designed for mission critical applications.

MySQL NDB Cluster has replication between clusters across multiple geographical sites built-in. A shared nothing architecture with data locality awareness make it the perfect choice for running on commodity hardware and in globally distributed cloud infrastructure." source

This seems like a very good fit for Wikidatawiki if you ask me. It's released under GPL2 according to enwiki. You can download it here and give it a try. I'm pretty sure the current tables in wikidatawiki can be easily migrated to it as mariadb and mysql are very similar. If I'm right and it is a drop-in replacement you don't have to rewrite or change a single line of code, but I could be wrong ;)
WDYT?

In T375470#10178954, @So9q wrote:

In T375470#10170498, @Ladsgroup wrote:

Turning MW's database to a distributed one is not really technically feasible. It's basically something along the lines of "rewrite mw to golang" in terms of amount of resources needed.

Really?
Do you know about MySQL Cluster?

Yes, I talked to the maintainers of it during some database related conferences.

"MySQL NDB Cluster is the distributed database combining linear scalability and high availability. It provides in-memory real-time access with transactional consistency across partitioned and distributed datasets. It is designed for mission critical applications.

MySQL NDB Cluster has replication between clusters across multiple geographical sites built-in. A shared nothing architecture with data locality awareness make it the perfect choice for running on commodity hardware and in globally distributed cloud infrastructure." source

This seems like a very good fit for Wikidatawiki if you ask me. It's released under GPL2 according to enwiki. You can download it here and give it a try. I'm pretty sure the current tables in wikidatawiki can be easily migrated to it as mariadb and mysql are very similar. If I'm right and it is a drop-in replacement you don't have to rewrite or change a single line of code, but I could be wrong ;)
WDYT?

That wouldn't work. If you don't believe me, please set up a distributed cluster and run a mediawiki backed by it.