最近做了一份SAP开发机的备份,将备份从开发机拷贝至一台新的 server上,准备用“恢复到某个时间点”的方法来做系统 恢复,做到最后一步,根据Arichieve RedoLog重新生成新的数据文件时,有一个system.data1在重新生成的时候一直报错,无法 生成,检查过目录
最近做了一份SAP开发机的备份,将备份从开发机拷贝至一台新的 server上,准备用“恢复到某个时间点”的方法来做系统
恢复,做到最后一步,根据Arichieve RedoLog重新生成新的数据文件时,有一个system.data1在重新生成的时候一直报错,无法
生成,检查过目录读写权限和使用者权限,无误。查看LOG_HISTORY 视图,LOG已经恢复到最新了,无奈,放弃了。于是使
用了Database Rest的方式做恢复,1小时多一点,数据库恢复起来了,SAP系统也起了。然后再用“恢复到时间点”的方式恢复
数据库,TMD又可以了,我真想Fuck这系统了。。。
不知道是不是自己操作中有错误的地方,还是自己对恢复原理的一些误解,浪费了许多时间。下次做恢复时,用migration的
方式试试,看看会不会出现问题。

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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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