Doesn't sharding imply horizontal partitioning? Some of their examples show vertical partitioning use cases. Not sure how I feel about that. I can't imagine why you would do microservices and host their databases as schemas on the same instance.
Because with schema-based sharding in Citus, the schemas are the sharding unit and the system can move them to new nodes being added to the cluster.
You can start with all your microservices sharing a single node, add nodes and have the storage layer distributed horizontally in a way transparent to the services themselves.
