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mysql自动化备份方案 一、配置数据库服务器1、撰写mysql自动备份脚本mysql备份主要包括热备和冷备，在此使用热备，也就是利用mysqldump导出SQL语句的方式进行备份#vi /etc/mysqlback.sh#!/bin/bash DB_NAME="luwenju" //需要备份的数据库DB_USER="luwenju" //数据库用户名DB_PASS="luwenju" //数据库密码BIN_DIR="/usr/local/mysql/bin" //mysql的环境变量BACK_DIR="/opt" //备份文件保存数据DATE="`date +%Y%m%d`"$BIN_DIR/mysqldump –opt -u$DB_USER -p$DB_PASS $DB_NAME > $BACK_DIR/luwenju_$DATE.sql#chmod +x /etc/mysqlback.sh测试#/etc/mysqlback.sh#ls /opt/luwenju_20110626.sql2、设置定时备份周期本案例中设置的为每日凌晨进行备份一次，具体备份周期根据具体应用#crontab –e0 0 * * * /etc/mysqlback.sh#/etc/init.d/crond restart3、安装rsync#tar zxvf rsync-3.0.8.tar.gz#cd rsync-3.0.8#./configure && make && make install创建配置文件,加入如下内容#vi /etc/rsync.confuid = nobody gid = nobodyuse chroot = nomax connections = 10pid file = /var/run/rsyncd.pidlock file = /var/run/rsyncd.locklog file = /var/log/rsyncd.logport = 873timeout = 300[backup]read only = yes //只读模式list = yesignore errorscomment = This is a file backpath = /opt //需要同步的目录auth users = test //验证用户secrets file = /etc/rsync.passwd //验证密码路径hosts allow = 119.232.33.246 //允许连接的客户端 作者 ibmfahsion bitsCN.com
图文详解mysql架构原理May 17, 2022 pm 05:54 PM本篇文章给大家带来了关于mysql的相关知识，其中主要介绍了关于架构原理的相关内容，MySQL Server架构自顶向下大致可以分网络连接层、服务层、存储引擎层和系统文件层，下面一起来看一下，希望对大家有帮助。
mysql的msi与zip版本有什么区别May 16, 2022 pm 04:33 PMmysql的msi与zip版本的区别：1、zip包含的安装程序是一种主动安装，而msi包含的是被installer所用的安装文件以提交请求的方式安装；2、zip是一种数据压缩和文档存储的文件格式，msi是微软格式的安装包。
mysql怎么去掉第一个字符May 19, 2022 am 10:21 AM方法：1、利用right函数，语法为“update 表名 set 指定字段 = right(指定字段, length(指定字段)-1)...”；2、利用substring函数，语法为“select substring(指定字段,2)..”。
mysql怎么替换换行符Apr 18, 2022 pm 03:14 PM在mysql中，可以利用char()和REPLACE()函数来替换换行符；REPLACE()函数可以用新字符串替换列中的换行符，而换行符可使用“char(13)”来表示，语法为“replace(字段名,char(13),'新字符串') ”。
MySQL复制技术之异步复制和半同步复制Apr 25, 2022 pm 07:21 PM本篇文章给大家带来了关于mysql的相关知识，其中主要介绍了关于MySQL复制技术的相关问题，包括了异步复制、半同步复制等等内容，下面一起来看一下，希望对大家有帮助。
mysql怎么将varchar转换为int类型May 12, 2022 pm 04:51 PM转换方法：1、利用cast函数，语法“select * from 表名 order by cast(字段名 as SIGNED)”；2、利用“select * from 表名 order by CONVERT(字段名,SIGNED)”语句。
mysql怎么判断是否是数字类型May 16, 2022 am 10:09 AM在mysql中，可以利用REGEXP运算符判断数据是否是数字类型，语法为“String REGEXP '[^0-9.]'”；该运算符是正则表达式的缩写，若数据字符中含有数字时，返回的结果是true，反之返回的结果是false。
mysql怎么删除unique keyMay 12, 2022 pm 03:01 PM在mysql中，可利用“ALTER TABLE 表名 DROP INDEX unique key名”语句来删除unique key；ALTER TABLE语句用于对数据进行添加、删除或修改操作，DROP INDEX语句用于表示删除约束操作。
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