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外包网页,seo一个空间建多个网站,中关村在线app下载,大庆网能做网站吗淘宝返利app多数据源设计#xff1a;基于MyCat的分库分表与读写分离 大家好#xff0c;我是省赚客APP研发者阿宝#xff01; 在省赚客这类高并发返利应用中#xff0c;用户订单、佣金记录、推广关系等核心数据量增长迅猛。单库单表在日均百万级订单下已出现性能瓶颈。为保障…淘宝返利app多数据源设计基于MyCat的分库分表与读写分离大家好我是省赚客APP研发者阿宝在省赚客这类高并发返利应用中用户订单、佣金记录、推广关系等核心数据量增长迅猛。单库单表在日均百万级订单下已出现性能瓶颈。为保障系统稳定性和扩展性我们采用MyCat作为中间件实现分库分表 读写分离的多数据源架构支撑当前千万级用户规模下的高效数据访问。整体架构设计系统部署4个MySQL实例2主2从通过MyCat逻辑库rebate_db对外提供统一入口写操作路由至主库dn1_master,dn2_master读操作负载均衡至从库dn1_slave,dn2_slave分片规则按用户ID哈希分片确保同一用户数据落在同一库。MyCat配置文件关键部分如下!-- schema.xml --schemanamerebate_dbcheckSQLschemafalsesqlMaxLimit100tablenameuser_orderdataNodedn1,dn2ruleuser_id_mod/tablenamecommission_recorddataNodedn1,dn2ruleuser_id_mod//schemadataNodenamedn1dataHosthost1databaserebate_01/dataNodenamedn2dataHosthost2databaserebate_02/dataHostnamehost1maxCon1000minCon10balance1writeHosthostmasterurl192.168.1.10:3306userrootpasswordxxxreadHosthostslaveurl192.168.1.11:3306userrootpasswordxxx//writeHost/dataHost分片规则定义在rule.xmltableRulenameuser_id_modrulecolumnsuser_id/columnsalgorithmmod-long/algorithm/rule/tableRulefunctionnamemod-longclassio.mycat.route.function.PartitionByModpropertynamecount2/property/functionJava应用连接配置Spring Boot项目通过JDBC URL直连MyCat端口8066无需感知底层分片# application.ymlspring:datasource:url:jdbc:mysql://mycat.juwatech.cn:8066/rebate_db?useUnicodetruecharacterEncodingutf8username:app_userpassword:secure_passworddriver-class-name:com.mysql.cj.jdbc.Driver业务代码保持透明例如订单创建packagejuwatech.cn.order.mapper;importorg.apache.ibatis.annotations.Insert;importorg.apache.ibatis.annotations.Mapper;importorg.apache.ibatis.annotations.Options;MapperpublicinterfaceUserOrderMapper{Insert(INSERT INTO user_order (user_id, order_no, amount, status) VALUES (#{userId}, #{orderNo}, #{amount}, #{status}))Options(useGeneratedKeystrue,keyPropertyid)intinsert(UserOrderorder);}MyCat根据user_id自动路由到dn1或dn2开发者无需编写分库逻辑。强制走主库场景处理对于“下单后立即查询”等强一致性场景需强制读主库。MyCat支持注解式路由packagejuwatech.cn.order.service;importorg.springframework.stereotype.Service;importorg.springframework.transaction.annotation.Transactional;ServicepublicclassOrderQueryService{Transactional(readOnlyfalse)publicUserOrdercreateAndQuery(StringuserId,StringorderNo){// 插入订单写主库orderMapper.insert(newUserOrder(userId,orderNo,100L,PENDING));// 强制读主库MyCat注解 /*balance*/ 或 /*master*/returnorderMapper.selectByOrderNoWithHint(orderNo);}}对应Mapper方法Select(/*master*/ SELECT * FROM user_order WHERE order_no #{orderNo})UserOrderselectByOrderNoWithHint(StringorderNo);该注释将绕过读写分离直接查询主库避免主从延迟导致查不到数据。全局自增ID生成由于分库后MySQL自增主键不再全局唯一我们采用Snowflake算法生成分布式IDpackagejuwatech.cn.common.id;ComponentpublicclassSnowflakeIdGenerator{privatefinalSnowflakesnowflakeIdUtil.createSnowflake(1,1);publiclongnextId(){returnsnowflake.nextId();}}在实体插入前赋值UserOrderordernewUserOrder();order.setId(idGenerator.nextId());order.setUserId(userId);orderMapper.insert(order);跨分片查询优化对于运营后台的全局统计需求如“昨日总佣金”避免全表扫描。我们采用以下策略冗余汇总表每日凌晨通过Flink聚合写入daily_commission_summary不分片异步导出大数据量查询走离线数仓不压在线库。示例汇总任务Scheduled(cron0 0 2 * * ?)publicvoidaggregateDailyCommission(){ListCommissionSummarysummariescommissionMapper.sumByDate(LocalDate.now().minusDays(1));summaryMapper.batchInsert(summaries);// 写入非分片表}监控与故障切换MyCat提供JDBC连接池监控和心跳检测。当主库宕机时自动切换至备用主库需配合MHA或Orchestrator。我们还通过Prometheus采集MyCat指标# mycat_exporter配置metrics_path:/actuator/prometheusstatic_configs:-targets:[mycat-metrics:9104]关键告警项包括连接池耗尽、SQL执行超时、主从延迟5s。上线后系统写入TPS提升3倍复杂查询响应时间从2s降至200ms以内有效支撑大促期间流量洪峰。本文著作权归聚娃科技省赚客app开发者团队转载请注明出处