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What is Sharding / Horizontal sharding?

A technique to partition a set of related data into smaller groups. Each group is called a shard, which has logically same schema as the unsharded data, the only difference is the data size. This technique is often to address scalability issue when a single database instance is incapable of serving all data, thus sharding is introduced to split the data and spread load across multiple instances. Sharding brings quite a lot overhead, so normally it's the last resort until a single instance reaches its scaling limit.

Safer and faster database change and version control for DBAs and Developers

Bytebase is an open source, web-based database schema change and version control tool for teams. It offers a web-based collaboration workspace to help DBAs and Developers manage the lifecycle of application database schemas.