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读写分离

语法说明

SHOW READWRITE_SPLITTING RULES [FROM databaseName]

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_query_enabled 读库全部下线,主库是否承担读流量
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 |                             | 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_query_enabled | write_data_source_name | read_data_source_names | load_balancer_type | load_balancer_props |
+--------------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
| readwrite_ds | ms_group_0                  |                                 |                        |                        | 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_query_enabled | write_data_source_name | read_data_source_names | load_balancer_type | load_balancer_props |
+--------------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
| readwrite_ds | ms_group_0                  |                                 | write_ds               | read_ds_0, read_ds_1   | random             | read_weight=2:1     |
+-------+-----------------------------+------------------------+------------------------+--------------------+---------------------+
1 row in set (0.00 sec)