readwrite_splitting

• Usage
  • Pre-work
  • Start ShardingProxy
  • Create a distributed database and sharding tables
  • Notice

Usage

Pre-work

1. Start the MySQL service
2. Create MySQL database (refer to ShardingProxy data source configuration rules)
3. Create a role or user with creation permission for ShardingProxy
4. Start Zookeeper service (for persistent configuration)

Start ShardingProxy

1. Add mode and authentication configurations to server.yaml (please refer to the example of ShardingProxy)
2. Start ShardingProxy (Related introduction)

Create a distributed database and sharding tables

1. Connect to ShardingProxy
2. Create a distributed database

CREATE DATABASE readwrite_splitting_db;

1. Use newly created database

USE readwrite_splitting_db;

1. Configure data source information

ADD RESOURCE write_ds (
HOST=127.0.0.1,
PORT=3306,
DB=ds_0,
USER=root,
PASSWORD=root
),read_ds (
HOST=127.0.0.1,
PORT=3307,
DB=ds_0,
USER=root,
PASSWORD=root
);

1. Create readwrite_splitting rule

CREATE READWRITE_SPLITTING RULE group_0 (
WRITE_RESOURCE=write_ds,
READ_RESOURCES(read_ds),
TYPE(NAME=random)
);

1. Alter readwrite_splitting rule

ALTER READWRITE_SPLITTING RULE group_0 (
WRITE_RESOURCE=write_ds,
READ_RESOURCES(read_ds),
TYPE(NAME=random,PROPERTIES(read_weight='2:0'))
)

1. Drop readwrite_splitting rule

DROP READWRITE_SPLITTING RULE group_0;

1. Drop resource

DROP RESOURCE write_ds,read_ds;

1. Drop distributed database

DROP DATABASE readwrite_splitting_db;

Notice

1. Currently, DROP DATABASE will only remove the logical distributed database, not the user’s actual database.
2. DROP TABLE will delete all logical fragmented tables and actual tables in the database.
3. CREATE DATABASE will only create a logical distributed database, so users need to create actual databases in advance .