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Posted to notifications@shardingsphere.apache.org by GitBox <gi...@apache.org> on 2022/11/22 09:53:19 UTC
[GitHub] [shardingsphere] peilinqian commented on issue #22050: In multi-sharding case,round_robin read_write_split stratages load balance is not based on one logic database
peilinqian commented on issue #22050:
URL: https://github.com/apache/shardingsphere/issues/22050#issuecomment-1323393290
```
we find java version: java8, full_version=1.8.0_282, full_path=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.282.b08-1.el7_9.x86_64/bin/java
ShardingSphere-5.2.2-SNAPSHOT
Commit ID: dirty-753c0cee8ee6fd3db00536da55b64bc5198a3758
Commit Message: Optimize sqlFederationExecutor init logic when sqlFederationType modify dynamically (#22209)
Branch: 753c0cee8ee6fd3db00536da55b64bc5198a3758
Build time: 2022-11-19T10:18:41+0800
```
```
split_db=> SHOW READWRITE_SPLITTING RULES;
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
------+-----------------------------+---------------------------------+-------------------------+-------------------------+-------------------------+---------------------
ds_0 | | | write_0 | read0_0,read0_1 | TRANSACTION_ROUND_ROBIN |
ds_1 | | | write_1 | read1_0,read1_1 | TRANSACTION_ROUND_ROBIN |
(2 rows)
split_db=> preview select * from t_ssdb where id=1 or id =2;
data_source_name | actual_sql
------------------+------------------------------------------
read1_1 | select * from t_ssdb where id=1 or id =2
read0_1 | select * from t_ssdb where id=1 or id =2
(2 rows)
split_db=> preview select * from t_ssdb where id=1 or id =2;
data_source_name | actual_sql
------------------+------------------------------------------
read1_0 | select * from t_ssdb where id=1 or id =2
read0_0 | select * from t_ssdb where id=1 or id =2
(2 rows)
split_db=> preview select * from t_ssdb where id=1 or id =2;
data_source_name | actual_sql
------------------+------------------------------------------
read1_1 | select * from t_ssdb where id=1 or id =2
read0_1 | select * from t_ssdb where id=1 or id =2
(2 rows)
split_db=> preview select * from t_ssdb where id=1 or id =2;
data_source_name | actual_sql
------------------+------------------------------------------
read1_0 | select * from t_ssdb where id=1 or id =2
read0_0 | select * from t_ssdb where id=1 or id =2
(2 rows)
split_db=> preview select * from t_ssdb where id=1 or id =2;
data_source_name | actual_sql
------------------+------------------------------------------
read1_1 | select * from t_ssdb where id=1 or id =2
read0_1 | select * from t_ssdb where id=1 or id =2
(2 rows)
```
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