galaxylqx opened a new issue #15881:
URL: https://github.com/apache/shardingsphere/issues/15881
Problem description: Multiple data sources use the same database instance.
For example, if the host is 127.0.0.1 and the port is 3306, multiple data
sources need to be created. If the same database instance has 100 databases,
100 data sources need to be created.
```
schemaName: sharding_db
dataSources:
ds_1:
url: jdbc:mysql://127.0.0.1:3306/db_1?serverTimezone=UTC&useSSL=false
username: root
password:
connectionTimeoutMilliseconds: 30000
idleTimeoutMilliseconds: 60000
maxLifetimeMilliseconds: 1800000
maxPoolSize: 50
minPoolSize: 1
ds_2:
url: jdbc:mysql://127.0.0.1:3306/db_2?serverTimezone=UTC&useSSL=false
username: root
password:
connectionTimeoutMilliseconds: 30000
idleTimeoutMilliseconds: 60000
maxLifetimeMilliseconds: 1800000
maxPoolSize: 50
minPoolSize: 1
```
Solution: The data source connection does not specify a specific database,
the data source is only a database connection, and the real database
corresponding to the data source can be periodically updated from the target
database through the background thread and maintained in memory.
```
schemaName: sharding_db
dataSources:
ds:
url: jdbc:mysql://127.0.0.1:3306/?serverTimezone=UTC&useSSL=false
username: root
password:
connectionTimeoutMilliseconds: 30000
idleTimeoutMilliseconds: 60000
maxLifetimeMilliseconds: 1800000
maxPoolSize: 50
minPoolSize: 1
rules:
- !SHARDING
tables:
t_order:
actualDataNodes: ds.order_db_${0..1}.t_order_${0..1}
tableStrategy:
standard:
shardingColumn: order_id
shardingAlgorithmName: t_order_inline
```
Add parameters to regularly update metadata.
server.yaml
```
props:
flush-metadata-interval-seconds: 0 # The default value is 0.
```
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