读写分离

语法说明

SHOW READWRITE_SPLITTING RULES [FROM schemaName]

返回值说明

说明
name 规则名称
auto_aware_data_source_name 自动发现数据源名称(配置动态读写分离规则显示)
write_data_source_name 写数据源名称
read_data_source_names 读数据源名称列表
load_balancer_type 负载均衡算法类型
load_balancer_props 负载均衡算法参数

示例

静态读写分离规则

mysql> show readwrite_splitting rules;
+------------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
| name       | auto_aware_data_source_name | write_data_source_name | read_data_source_names | load_balancer_type | load_balancer_props |
+------------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
| ms_group_0 | NULL                        | ds_primary             | ds_slave_0, ds_slave_1 | random             |                     |
+------------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
1 row in set (0.00 sec)

动态读写分离规则

mysql> show readwrite_splitting rules from readwrite_splitting_db;
+-------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
| name  | auto_aware_data_source_name | write_data_source_name | read_data_source_names | load_balancer_type | load_balancer_props |
+-------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
| pr_ds | ms_group_0                  | NULL                   |                        | random             | read_weight=2:1     |
+-------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
1 row in set (0.01 sec)

静态读写分离规则和动态读写分离规则

mysql> show readwrite_splitting rules from readwrite_splitting_db;
+-------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
| name  | auto_aware_data_source_name | write_data_source_name | read_data_source_names | load_balancer_type | load_balancer_props |
+-------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
| pr_ds | ms_group_0                  | write_ds               | read_ds_0, read_ds_1   | random             | read_weight=2:1     |
+-------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
1 row in set (0.00 sec)