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mysql Read write separation configuration

With the increase of website visits and requests , The connection to a single database server has been exhausted , The connection request is still waiting , Or the database server crashes , At this point, we consider how to reduce the database connection , You can optimize your code 、 Use the cache 、 Database read-write separation and other methods to solve this problem . What is separation of reading and writing ： Read the database 、 Write operations work on different databases （ Different physical machines ） On . Applicable scenario ： Read operations are far greater than write operations , Contains a large number of complex statistics 、 Offline computing and other tasks （ For example, statistics and analysis of data are performed regularly according to each dimension , Or settlement Commission, etc ） Studied for a while , Various problems occurred during the configuration process .. It has just been configured today windows System environment ： This machine +VM virtual machine ：MySql5.6, Install first. MySql find MySql5.6 Of my.ini The configuration file , stay C:\ProgramData\MySQL\MySQL Server 5.6 Directory ,ProgramData Folders are hidden by default Mysql The reality of master-slave synchronization ： 1、Master The library records changes to binlog in 2、Slave take master Of binlog Copy to its relay log( relay logs ) in 3、slave Redo events in relay log Read / write separation can be realized through the middle price , Such as Ameba,Corba,mysql-Proxy( official )

practice

A： Main warehouse operation 1、 stay my.ini Of documents [mysqld] Section, add the following configuration items ： server-id=1 log-bin=master-bin.log sync_binlog=1 binlog-do-db=d # To the database d Log , This parameter may not be configured , My is not configured

2、 Use root The user logs in to the main library mysql, Create a user for synchronization , The slave database synchronizes the master database data through the user 3、 User authorization to be synchronized ：GRANT REPLICATION SLAVE ON . to ‘test’@’%’ identified by ‘test’; 4、 Restart the main library mysql service , And log in again to view the main database status ：show master status;

Remember the following master-bin.000001 and 422 This is the file to be synchronized from the library and the location of the synchronization

B： Operation from the library 1、 Log in to the virtual machine , stay my.ini Of documents [mysqld] Section, add the following configuration items ： server-id=2 log-bin=myslave-bin.log sync_binlog=1

2、 Use root User login from library mysql, Modify the... From the library master Information change master to master_host=’192.168.1.109’,master_user=’test’,master_password=’test’,master_log_file=’mysql-bin.,000001’,master_log_pos=422;– Note the log number

3、 Start from library ：start slave; 4、 View the slave library status ：show slave status; The two parameters in the red box below are Yes, The master-slave configuration is successful ！, It was tragic ,Slave_IO_Running Has always been a No perhaps Connecting.

Now the configuration is complete ... The following tests whether the changes of the master library will be synchronized to the slave library ... Use the test The user logs in to the main library , open cmd command , Locate the mysql Of the installation directory bin Catalog ,cd C:\ProgramData\MySQL\MySQL Server 5.6

Log in from library , Check out the test Whether the library has added a table t And data

Re execution update Order to try

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