Craig here from Citus. Spanner is absolutely some interesting technology, but focuses on some pretty different use cases than we're looking to solve. Spanner is

Craig here from Citus. Spanner is absolutely some interesting technology, but focuses on some pretty different use cases than we're looking to solve. Spanner is globally distributed but the cost of that is likely to be 100ms per operation. Further it uses SQL for the read, but the insert and update is RPC so it's a bit of a different interface. Citus is much more focused on interacting like a relational database that simply scales out as opposed to re-inventing a lot of the underlying tech and interfaces. You can find the comment further down from one of our founders, but we're very focused on a few use cases. 1. Scaling beyond single node Postgres (this primarily for B2B applications currently) 2. Operational analytics, here because of the way we parallelize the workload you can get sub-second query performance across terabytes of data. 3. NoSQL++, this is a bit more akin to where spanner may fit, where you have exceptionally high read and write throughput requirements. (Exceptionally high meaning north of 100k writes per second).