Home Database Mysql Tutorial Introduction to the implementation ideas and methods of incremental backup of Mysql database

Introduction to the implementation ideas and methods of incremental backup of Mysql database

May 25, 2018 am 10:24 AM
mysql accomplish 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
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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
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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
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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]#
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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
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总结

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