mycat垂直分库
数据库的主从复制
- MySQL备份源数据库并记录事务点
# master导出单个库的备份SET GLOBAL log_timestamps = SYSTEM;（/usr/local/mysql/bin/mysqldump -uroot -p123456 -hlocalhost -P3306 --socket=/usr/local/mysql/mysql.sock --single-transaction --master-data=2 imooc_db --triggers --routines --events > /tmp/all.sql
- 源数据库中建立从库（复制用户）
grant replication slave on *.* to 'repl'@'%' identified by '123456';
- 在新的数据库实例上恢复数据库，并修改数据库名称。
mysql -uroot -p123456 -e"create database order_db";mysql -uroot -p123456 order_db < /tmp/all.sqlmysql -uroot -p123456 -e"create database product_db";mysql -uroot -p123456 product_db < /tmp/all.sqlmysql -uroot -p123456 -e"create database customer_db";mysql -uroot -p123456 customer_db < /tmp/all.sql######################################ERROR 1840 (HY000) at line 24: @@GLOBAL.GTID_PURGED can only be set when @@GLOBAL.GTID_EXECUTED is emptyQuery OK, 0 rows affected (0.01 sec)root@localhost 23:55: [(none)]> show master status;+---------------+----------+--------------+------------------+-------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |+---------------+----------+--------------+------------------+-------------------+| binlog.000001 | 154 | | | |+---------------+----------+--------------+------------------+-------------------+1 row in set (0.00 sec)root@localhost 23:55: [(none)]> show master status;+---------------+----------+--------------+------------------+-------------------------------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |+---------------+----------+--------------+------------------+-------------------------------------------+| binlog.000001 | 154 | | | ad083f85-9264-11e8-9e91-005056a3fe0a:1-85 |+---------------+----------+--------------+------------------+-------------------------------------------+1 row in set (0.00 sec)
- 在新实例数据库上配置复制链路
\help change master toCHANGE MASTER TO MASTER_HOST='172.16.10.141', MASTER_USER='repl', MASTER_PASSWORD='123456', MASTER_PORT=3306, master_auto_position=1;\help change replication filterCHANGE REPLICATION FILTER REPLICATE_REWRITE_DB = ((imooc_db, order_db));CHANGE REPLICATION FILTER REPLICATE_REWRITE_DB = ((imooc_db, product_db));CHANGE REPLICATION FILTER REPLICATE_REWRITE_DB = ((imooc_db, customer_db));start slave;# 主库插入数据验证root@localhost 00:12: [imooc_db]> insert into region_info(parent_id,region_name,region_level) values(1,'guangdong',2);# 从库查看数据root@localhost 00:13: [order_db]> select * from region_info;+-----------+-----------+-------------+--------------+| region_id | parent_id | region_name | region_level |+-----------+-----------+-------------+--------------+| 1 | 1 | guangdong | 2 |+-----------+-----------+-------------+--------------+1 row in set (0.00 sec)# 其他2个也这么同步
配置mycat垂直分库
- 配置schema.xml，需要的权限
grant select,insert,update,delete on *.* to 'bm_mycat'@'%' identified by '123456';
- 配置schema.xml，数据库分库实现
show slave status show slave status show slave status
验证通过mycat访问db
使用命令行访问方式[root@mycat01 logs]# mysql -uapp_imooc -p123456 -P8066Warning: Using a password on the command line interface can be insecure.ERROR 1045 (28000): Access denied for user 'app_imooc'@'localhost' (using password: YES)[root@mycat01 logs]# mysql -uapp_imooc -p123456 -P8066 -h172.16.10.142Warning: Using a password on the command line interface can be insecure.Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 1Server version: 5.5.8-mycat-1.5.1-RELEASE-20160525110043 MyCat Server (OpenCloundDB)Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.app_imooc@172.16.10.142 01:59: [(none)]> show databases;+----------+| DATABASE |+----------+| imooc_db |+----------+1 row in set (0.00 sec)app_imooc@172.16.10.142 01:59: [(none)]> use imooc_db;Database changedapp_imooc@172.16.10.142 01:59: [imooc_db]> show tables;+-----------------------+| Tables in imooc_db |+-----------------------+| customer_balance_log || customer_inf || customer_level_inf || customer_login || customer_login_log || customer_point_log || order_cart || order_customer_addr || order_detail || order_master || product_brand_info || product_category || product_comment || product_info || product_pic_info || product_supplier_info || region_info || serial || shipping_info || warehouse_info || warehouse_proudct |+-----------------------+21 rows in set (0.01 sec)app_imooc@172.16.10.142 01:59: [imooc_db]>
使用程序访问方式：与java访问MySQL数据库方式一模一样，应用程序不需要做任何更改。只需要改变数据库链接地址，及用户口令即可。