Shardingsphere分库分表

中文官方文档

https://shardingsphere.apache.org/document/current/cn/overview/

依赖包

<dependency>
    <groupId>org.apache.shardingsphere</groupId>
    <artifactId>sharding‐jdbc‐spring‐boot‐starter</artifactId>
    <version>4.0.0‐RC1</version>
</dependency>

ShardingJDBC分库分表配置

垂直分表：user->user_info（常用字段）和user_detail（不常用字段）
垂直分库：user_db和product_db
水平分表：user_${1..2}（单表数据最好不超过1000w）
水平分库：db_${1..2}

#端口
server.port = 56082

#应用名
spring.application.name = shopping

#该配置运行环境为本地，dev开发，qas测试，prd生产
spring.profiles.active = local

#项目路径localhost:56082/shopping，thymeleaf无需添加/shopping
server.servlet.context-path = /shopping

#http编码配置UTF-8
spring.http.encoding.enabled = true
spring.http.encoding.charset = UTF-8
spring.http.encoding.force = true

#允许bean配置覆盖原有的bean
spring.main.allow-bean-definition-overriding = true

#mybatis驼峰，a_b -> aB
mybatis.configuration.map-underscore-to-camel-case = true

#sharding-jdbc分片规则
#配置数据源 m0,m1,m2,s0,s1,s2
spring.shardingsphere.datasource.names = m0, m1, m2, s0, s1, s2

spring.shardingsphere.datasource.m0.type = com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.m0.driver-class-name = com.mysql.jdbc.Driver
spring.shardingsphere.datasource.m0.url = jdbc:mysql://localhost:3306/store_db?characterEncoding=utf8
spring.shardingsphere.datasource.m0.username = root
spring.shardingsphere.datasource.m0.password = 123456

spring.shardingsphere.datasource.m1.type = com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.m1.driver-class-name = com.mysql.jdbc.Driver
spring.shardingsphere.datasource.m1.url = jdbc:mysql://localhost:3306/product_db_1?characterEncoding=utf8
spring.shardingsphere.datasource.m1.username = root
spring.shardingsphere.datasource.m1.password = 123456

spring.shardingsphere.datasource.m2.type = com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.m2.driver-class-name = com.mysql.jdbc.Driver
spring.shardingsphere.datasource.m2.url = jdbc:mysql://localhost:3306/product_db_2?characterEncoding=utf8
spring.shardingsphere.datasource.m2.username = root
spring.shardingsphere.datasource.m2.password = 123456

spring.shardingsphere.datasource.s0.type = com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.s0.driver-class-name = com.mysql.jdbc.Driver
spring.shardingsphere.datasource.s0.url = jdbc:mysql://localhost:3307/store_db?characterEncoding=utf8
spring.shardingsphere.datasource.s0.username = root
spring.shardingsphere.datasource.s0.password = 123456

spring.shardingsphere.datasource.s1.type = com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.s1.driver-class-name = com.mysql.jdbc.Driver
spring.shardingsphere.datasource.s1.url = jdbc:mysql://localhost:3307/product_db_1?characterEncoding=utf8
spring.shardingsphere.datasource.s1.username = root
spring.shardingsphere.datasource.s1.password = 123456

spring.shardingsphere.datasource.s2.type = com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.s2.driver-class-name = com.mysql.jdbc.Driver
spring.shardingsphere.datasource.s2.url = jdbc:mysql://localhost:3307/product_db_2?characterEncoding=utf8
spring.shardingsphere.datasource.s2.username = root
spring.shardingsphere.datasource.s2.password = 123456

#主从关系，ds为逻辑名
spring.shardingsphere.sharding.master-slave-rules.ds0.master-data-source-name = m0
spring.shardingsphere.sharding.master-slave-rules.ds0.slave-data-source-names = s0
spring.shardingsphere.sharding.master-slave-rules.ds1.master-data-source-name = m1
spring.shardingsphere.sharding.master-slave-rules.ds1.slave-data-source-names = s1
spring.shardingsphere.sharding.master-slave-rules.ds2.master-data-source-name = m2
spring.shardingsphere.sharding.master-slave-rules.ds2.slave-data-source-names = s2

#分库策略（水平）
spring.shardingsphere.sharding.default-database-strategy.inline.sharding-column = store_info_id
spring.shardingsphere.sharding.default-database-strategy.inline.algorithm-expression = ds$->{store_info_id % 2 + 1}

#分表策略
#store_info分表策略
spring.shardingsphere.sharding.tables.store_info.actual-data-nodes = ds$->{0}.store_info
spring.shardingsphere.sharding.tables.store_info.table-strategy.inline.sharding-column = id
spring.shardingsphere.sharding.tables.store_info.table-strategy.inline.algorithm-expression = store_info

#product_info分表策略
spring.shardingsphere.sharding.tables.product_info.actual-data-nodes = ds$->{1..2}.product_info_$->{1..2}
spring.shardingsphere.sharding.tables.product_info.table-strategy.inline.sharding-column = product_info_id
spring.shardingsphere.sharding.tables.product_info.table-strategy.inline.algorithm-expression = product_info_$->{product_info_id%2+1}
spring.shardingsphere.sharding.tables.product_info.key-generator.column = product_info_id
spring.shardingsphere.sharding.tables.product_info.key-generator.type = SNOWFLAKE

#product_descript分表策略
spring.shardingsphere.sharding.tables.product_descript.actual-data-nodes = ds$->{1..2}.product_descript_$->{1..2}
spring.shardingsphere.sharding.tables.product_descript.table-strategy.inline.sharding-column = product_info_id
spring.shardingsphere.sharding.tables.product_descript.table-strategy.inline.algorithm-expression = product_descript_$->{product_info_id % 2 + 1}
spring.shardingsphere.sharding.tables.product_descript.key-generator.column = id
spring.shardingsphere.sharding.tables.product_descript.key-generator.type = SNOWFLAKE

#设置product_info,product_descript为绑定表，绑定表的配置从[0]开始
spring.shardingsphere.sharding.binding-tables[0] = product_info, product_descript

#设置region为广播表(公共表)，每次更新操作会发送至所有数据源
spring.shardingsphere.sharding.broadcast-tables = region

#打开sql输出日志
spring.shardingsphere.props.sql.show = true

#swagger
swagger.enable = true

#日志配置
logging.level.root = info
logging.level.org.springframework.web = info
logging.level.com.itheima.dbsharding  = debug