Sharding

Storage unit Operation

• Configure data source information

REGISTER STORAGE UNIT ds_0 (
    HOST="127.0.0.1",
    PORT=3306,
    DB="ds_1",
    USER="root",
    PASSWORD="root"
),ds_1 (
    HOST="127.0.0.1",
    PORT=3306,
    DB="ds_2",
    USER="root",
    PASSWORD="root"
);

Rule Operation

• Create sharding rule

CREATE SHARDING TABLE RULE t_order(
STORAGE_UNITS(ds_0,ds_1),
SHARDING_COLUMN=order_id,
TYPE(NAME="hash_mod",PROPERTIES("sharding-count"="4")),
KEY_GENERATE_STRATEGY(COLUMN=order_id,TYPE(NAME="snowflake"))
);

• Create sharding table

CREATE TABLE `t_order` (
  `order_id` int NOT NULL,
  `user_id` int NOT NULL,
  `status` varchar(45) DEFAULT NULL,
  PRIMARY KEY (`order_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4

• Drop sharding table

DROP TABLE t_order;

• Drop sharding rule

DROP SHARDING TABLE RULE t_order;

• Unregister storage unit

UNREGISTER STORAGE UNIT ds_0, ds_1;

• Drop distributed database

DROP DATABASE foo_db;