


Introduction to the implementation ideas and methods of incremental backup of Mysql database
MySQL数据库增量备份,在这之前修改我们的数据库配置文件/etc/my.cnf开启bin-log日志功能即可,下面小编给大家分享Mysql数据库增量备份的思路详解,一起看看吧
MySQL数据库增量备份,在这之前修改我们的数据库配置文件/etc/my.cnf开启bin-log日志功能即可。接下来是我参考了下网上的一些方法,自己写的,主要还是要能学到他的一些思路和方法。
#function:MYSQL增量备份 #version:1.0.0 #author:wangyanlin #date:2017/08/02 #----------------------------------------------------------------------------------------------- #!/bin/sh export LANG=en_US.UTF-8 #设置时间 DATE=`date +%Y%m%d` #设置信息 USER=root PASSWORD=withub #设置路径 cd / /usr/bin/mkdir -p mysql_bak/daily /usr/bin/mkdir -p mysql_bak/logs BakDir=/mysql_bak/daily BinDir=/var/lib/mysql LogFile=/mysql_bak/logs/Daily_$DATE.log BinlogFile=/var/lib/mysql/mysql-bin.index /usr/bin/mysqladmin -u$USER -p$PASSWORD flush-logs #刷新日志 Counter=`wc -l $BinlogFile | awk '{print $1}'` NextNum=0 start_time=`date +'%Y-%m-%d %H:%M:%S'` echo `date +"%Y年%m月%d日 %H:%M:%S"` $Next1 Bakup start! >> $LogFile #这个for循环用于比对$Counter,$NextNum这两个值来确定文件是不是存在或最新的。 for file in `cat $BinlogFile` do base=`basename $file` #basename用于截取mysql-bin.00000*文件名,去掉./mysql-bin.000005前面的./ NextNum=`expr $NextNum + 1` if [ $NextNum -eq $Counter ] then echo $base skip! >> $LogFile else dest=$BakDir/$base if(test -e $dest) #test -e用于检测目标文件是否存在,存在就写exist!到$LogFile去。 then echo $base exist! >> $LogFile else cp $BinDir/$base $BakDir echo $base copying >> $LogFile fi fi done echo `date +"%Y年%m月%d日 %H:%M:%S"` $Next2 Bakup succ! >> $LogFile end_time=`date +'%Y-%m-%d %H:%M:%S'` start_seconds=$(date --date="$start_time" +%s); end_seconds=$(date --date="$end_time" +%s); echo "本次备份运行时间: "$((end_seconds-start_seconds))"s" >> $LogFile
添加计划任务:
crontab -e
00 03 * * * /root/MySQL_incrementbak.sh #每天的凌晨3点开始增量备份日
logs日志打印出来的效果:
PS:下面看下mysql全量和增量备份脚本
全量:
[root@master leo]# cat DBfullBak.sh #!/bin/bash #use mysqldump to fully backup mysql data BakDir=/root/leo/full LogFile=/root/leo/full/bak.log Date=`date +%Y%m%d` Begin=`date +"%Y年%m月%d日 %H:%M:%S"` cd $BakDir DumpFile=$Date.sql GZDumpFile=$Date.sql.tgz mysqldump -uroot -p123456 --all-databases --lock-all-tables --routines --triggers --events --master-data=2 --flush-logs > $DumpFile tar zcvf $GZDumpFile $DumpFile rm $DumpFile Last=`date +"%Y年%m月%d日 %H:%M:%S"` echo 开始:$Begin 结束:$Last $GZDumpFile succ >> $LogFile
参数注释:
--all-databases #备份所有库 --lock-all-tables #为所有表加读锁 --routinge #存储过程与函数 --triggers #触发器 --events #记录事件 --master-data=2 #在备份文件中记录当前二进制日志的位置,并且为注释的,1是不注释掉在主从复制中才有意义 --flush-logs #日志滚动一次
结果如下:
[root@master full]# ls 20140728.sql.tgz bak.log [root@master full]# cat bak.log 开始:2014年07月28日 19:02:59 结束:2014年07月28日 19:02:59 20140728.sql.tgz succ 开始:2014年07月28日 19:12:01 结束:2014年07月28日 19:12:01 20140728.sql.tgz succ [root@master full]#
增量备份:
[root@master leo]# cat DBDailyBak.sh #!/bin/bash BakDir=/root/leo/binlog/ BinDir=/var/lib/mysql LogFile=/root/leo/binlog/bak.log BinFile=/var/lib/mysql/mysql-bin.index mysqladmin -uroot -p123456 flush-logs Counter=`wc -l $BinFile|awk '{print $1}'` NextNum=0 for file in `cat $BinFile` do base=`basename $file` NextNum=`expr $NextNum + 1` if [ $NextNum -eq $Counter ] then echo $base skip! >> $LogFile else dest=$BakDir/$base if(test -e $dest) then echo $base exist! >> $LogFile else cp $BinDir/$base $BakDir/ echo $base copying >> $LogFile fi fi done echo `date +"%Y年%m月%d日 %H:%M:%S"` $Next Bakup succ~ >> $LogFile
总结
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