#####################################Mysql复制的作用和原理mysql-5.5实现主从复制mysql-5.6主从复制和Mysql_Proxy的实现mysql-5.6基于amoeba实现读写分离####
#####################################
Mysql复制的作用和原理
mysql-5.5实现主从复制
mysql-5.6主从复制和Mysql_Proxy的实现
mysql-5.6基于amoeba实现读写分离
#####################################
Mysql复制的作用和原理
复制的作用
复制原理
复制流程如下:
relaylog(中继日志)
mysql-5.5实现主从复制
结构图如下:
安装mysql
mkdir -pv /mydata/data useradd -r mysql chown -R mysql.mysql /mydata/data tar xf mysql-5.5.28-linux2.6-i686.tar.gz -C /usr/local cd /usr/local/ ln -sv mysql-5.5.28-linux2.6-i686 mysql cd mysql chown -R root.mysql ./* scripts/mysql_install_db --user=mysql --datadir=/mydata/data/ cp support-files/my-large.cnf /etc/my.cnf cp support-files/mysql.server /etc/rc.d/init.d/mysqld chkconfig --add mysqld vim /etc/profile.d/mysql.sh export PATH=$PATH:/usr/local/mysql/bin . /etc/profile.d/mysql.sh
Master配置
#####修改配置文件 vim /etc/my.cnf datadir = /mydata/data log-bin=master-bin log-bin-index=master-bin.index innodb_file_per_table = 1 binlog_format=mixed server-id = 1 sync_binlog = 1 innodb_flush_logs_at_trx_commit = 1 #####开启Slave权限用户 mysql> GRANT REPLICATION SLAVE ON *.* TO 'repluser'@'192.168.1.%' IDENTIFIED BY 'replpass'; Query OK, 0 rows affected (0.00 sec) mysql> FLUSH PRIVILEGES; Query OK, 0 rows affected (0.00 sec)Slave配置
#####修改配置文件vim /etc/my.cnf datadir = /mydata/data relay-log = relay-log relay-log-index = relay-log.index read-only = ON server-id = 11 skip_slave_start = 1 read_only = 1 #####查看主日志文件和事件位置 mysql> show master status; +-------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +-------------------+----------+--------------+------------------+ | master-bin.000001 | 340 | | | +-------------------+----------+--------------+------------------+ #####开启slave复制功能 mysql> CHANGE MASTER TO MASTER_HOST='192.168.1.131',MASTER_USER='repluser', MASTER_PASSWORD='replpass',MASTER_LOG_FILE='master-bin.000001',MASTER_LOG_POS=340; #####查看slave状态,可得出master二进制日志和slave中继日志的事件和位置对应未必同意所以在slave备份的时候应该记录主服务器的二进制日志,只有二进制日志才可以完成即使点还原 Slave_IO_Running: No Slave_SQL_Running: No 均为yes代表slave复制正常 #####查看复制状态 mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Master_Host: 192.168.1.131 Master_User: repluser Master_Port: 3306 Connect_Retry: 60 Master_Log_File: master-bin.000001 Read_Master_Log_Pos: 340 Relay_Log_File: relay-log.000001 Relay_Log_Pos: 4 Relay_Master_Log_File: master-bin.000001 Slave_IO_Running: No Slave_SQL_Running: No Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 340 #重放到的位置 Relay_Log_Space: 107 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: NULL Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 0 #####开启复制进程 mysql> START SLAVE;
测试
#####Master mysql> create database soulboy; Query OK, 1 row affected (0.00 sec) #####Slave mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | soulboy | | test | +--------------------+ 5 rows in set (0.00 sec)mysql-5.6主从复制和Mysql_Proxy的实现
复制功能的改进
支持多线程复制,事实上是针对每个database开启相应的独立线程。即每个库有一个单独的(sql thread)如果线上业务中,只有一个database或者绝大多数压力集中在个别database的话,多线程并发复制特性就没有意义了。
支持启用GTID,对运维人员来说应该是一件令人高兴的事情,在配置主从复制,传统的方式里,你需要找到binlog和POS点,然后change master to指向,而不是很有经验的运维,往往会将其找错,造成主从同步复制报错,在mysql5.6里,无须再知道binlog和POS点,需要知道master的IP、端口,账号密码即可,因为同步复制是自动的,mysql通过内部机制GTID自动找点同步。
结构图如下:
Mysql-5.6主从复制功能的实现步骤
Master配置(安装步骤省略)

MySQLviewshavelimitations:1)Theydon'tsupportallSQLoperations,restrictingdatamanipulationthroughviewswithjoinsorsubqueries.2)Theycanimpactperformance,especiallywithcomplexqueriesorlargedatasets.3)Viewsdon'tstoredata,potentiallyleadingtooutdatedinforma

ProperusermanagementinMySQLiscrucialforenhancingsecurityandensuringefficientdatabaseoperation.1)UseCREATEUSERtoaddusers,specifyingconnectionsourcewith@'localhost'or@'%'.2)GrantspecificprivilegeswithGRANT,usingleastprivilegeprincipletominimizerisks.3)

MySQLdoesn'timposeahardlimitontriggers,butpracticalfactorsdeterminetheireffectiveuse:1)Serverconfigurationimpactstriggermanagement;2)Complextriggersincreasesystemload;3)Largertablesslowtriggerperformance;4)Highconcurrencycancausetriggercontention;5)M

Yes,it'ssafetostoreBLOBdatainMySQL,butconsiderthesefactors:1)StorageSpace:BLOBscanconsumesignificantspace,potentiallyincreasingcostsandslowingperformance.2)Performance:LargerrowsizesduetoBLOBsmayslowdownqueries.3)BackupandRecovery:Theseprocessescanbe

Adding MySQL users through the PHP web interface can use MySQLi extensions. The steps are as follows: 1. Connect to the MySQL database and use the MySQLi extension. 2. Create a user, use the CREATEUSER statement, and use the PASSWORD() function to encrypt the password. 3. Prevent SQL injection and use the mysqli_real_escape_string() function to process user input. 4. Assign permissions to new users and use the GRANT statement.

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

ToaddauserinMySQL,use:CREATEUSER'username'@'host'IDENTIFIEDBY'password';Here'showtodoitsecurely:1)Choosethehostcarefullytocontrolaccess.2)SetresourcelimitswithoptionslikeMAX_QUERIES_PER_HOUR.3)Usestrong,uniquepasswords.4)EnforceSSL/TLSconnectionswith

ToavoidcommonmistakeswithstringdatatypesinMySQL,understandstringtypenuances,choosetherighttype,andmanageencodingandcollationsettingseffectively.1)UseCHARforfixed-lengthstrings,VARCHARforvariable-length,andTEXT/BLOBforlargerdata.2)Setcorrectcharacters


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

Zend Studio 13.0.1
Powerful PHP integrated development environment

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

Dreamweaver Mac version
Visual web development tools
