If you are a Ruby on Rails developer, I think you'll really enjoy this article. It aims to help you get started with TiDB, an open-source NewSQL database, and use it to power up your Rails applications.
Use TiDB to Build Up Your Ruby on Rails Applications
TiDB is an open-source NewSQL database that supports Hybrid Transactional and Analytical Processing (HTAP) workloads. It is MySQL compatible and features horizontal scalability, strong consistency, and high availability.