1. 环境:CentOS5.5 x84,MySQL5.5.152. 两台机器:master1:192.168.5.143master2:192.168.0.1493. 单独编译安装MySQL,并测试连
10. 测试
实验1:启动两个服务,在任一mysql上进行操作,在另一mysql上均能体现出来。
实验2:启动两个服务,在master1上通过tpcc工具添加20个warehouse,数据占用硬盘约1.9G,,在两台机器上计算count(*),数据一致。
实验3:启动master1,在master1上通过tpcc工具添加一个warehouse,启动master2,同步一段时间后,计算count(*),结果一致。
ps,MySQL的主主复制实际上就是双向的主从复制。

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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


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