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Readwrite-Splitting

Syntax

SHOW READWRITE_SPLITTING RULES [FROM databaseName]

参数解释

Name DateType Description
databaseName IDENTIFIER Database name

Return Value Description

Column Description
name Rule name
auto_aware_data_source_name Auto-Aware discovery data source name (Display configuration dynamic readwrite splitting rules)
write_data_source_query_enabled All read data source are offline, write data source whether the data source is responsible for read traffic
write_storage_unit_name Write data source name
read_storage_unit_names Read data source name list
load_balancer_type Load balance algorithm type
load_balancer_props Load balance algorithm parameter

Example

Static Readwrite Splitting Rules

mysql> SHOW READWRITE_SPLITTING RULES;
+------------+-----------------------------+-------------------------+-------------------------+--------------------+---------------------+
| name       | auto_aware_data_source_name | write_storage_unit_name | read_storage_unit_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)

Dynamic Readwrite Splitting Rules

mysql> SHOW READWRITE_SPLITTING RULES FROM readwrite_splitting_db;
+--------------+-----------------------------+---------------------------------+-------------------------+-------------------------+--------------------+---------------------+
| name         | auto_aware_data_source_name | write_data_source_query_enabled | write_storage_unit_name | read_storage_unit_names | load_balancer_type | load_balancer_props |
+--------------+-----------------------------+---------------------------------+-------------------------+-------------------------+--------------------+---------------------+
| readwrite_ds | ms_group_0                  |                                 |                         |                         | random             | read_weight=2:1     |
+--------------+-----------------------------+---------------------------------+-------------------------+-------------------------+--------------------+---------------------+
1 row in set (0.01 sec)

Static Readwrite Splitting Rules And Dynamic Readwrite Splitting Rules

mysql> SHOW READWRITE_SPLITTING RULES FROM readwrite_splitting_db;
+--------------+-----------------------------+---------------------------------+-------------------------+-------------------------+--------------------+---------------------+
| name         | auto_aware_data_source_name | write_data_source_query_enabled | write_storage_unit_name | read_storage_unit_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)