Core Concept

• Primary Database
• Replica Database
• Primary Replica Replication
• Load Balance Strategy

Primary Database

It refers to the database used in data insertion, update and deletion. It only supports single primary database for now.

Replica Database

It refers to the database used in data query. It supports multiple replica databases.

Primary Replica Replication

It refers to the operation to asynchronously replicate data from the primary database to the replica database. Because of the asynchrony of primary-replica synchronization, there may be short-time data inconsistency between them.

Load Balance Strategy

Through this strategy, queries separated to different replica databases.