Use Norms

Supported

• Provide the readwrite-splitting configuration of one primary database with multiple replica databases, which can be used alone or with sharding table and database;
• Primary nodes need to be used for both reading and writing in the transaction;
• Forcible primary database route based on SQL Hint;

Unsupported

• Data replication between the primary and the replica databases;
• Data inconsistency caused by replication delay between databases;
• Double or multiple primary databases to provide write operation;
• The data for transaction across primary and replica nodes are inconsistent; In the readwrite-splitting model, primary nodes need to be used for both reading and writing in the transaction.