mysql全量备份、增量备份实现方法

[mysqld]
log-bin = "/home/mysql/logbin.log"
binlog-format = ROW
log-bin-index = "/home/mysql/logindex"
binlog_cache_size=32m
max_binlog_cache_size=512m
max_binlog_size=512m

mkdir -p /home/mysql/backup/daily

cd /home/mysql
vi binlogbak.sh

#!/bin/bash
export LANG=en_US.UTF-8
BakDir=/home/mysql/backup/daily
BinDir=/home/mysql
LogFile=/home/mysql/backup/binlog.log
BinFile=/home/mysql/logindex.index
mysqladmin -uroot -proot123 flush-logs
#这个是用于产生新的mysql-bin.00000*文件
Counter=`wc -l $BinFile |awk '{print $1}'`
NextNum=0
#这个for循环用于比对$Counter,$NextNum这两个值来确定文件是不是存在或最新的。
for file in `cat $BinFile`
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"` Bakup succ!  $LogFile

chmod a+x /home/mysql/binlogbak.sh

vi databak.sh

#!/bin/bash
export LANG=en_US.UTF-8
BakDir=/home/mysql/backup
LogFile=/home/mysql/backup/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 -proot123 --all-databases --flush-logs --delete-master-logs --single-transaction > $DumpFile
tar -czvf $GZDumpFile $DumpFile
rm $DumpFile

count=$(ls -l *.tgz |wc -l)
if [ $count -ge 5 ]
then
file=$(ls -l *.tgz |awk '{print $9}'|awk 'NR==1')
rm -f $file
fi
#只保留过去四周的数据库内容

Last=`date +"%Y年%m月%d日 %H:%M:%S"`
echo 开始:$Begin 结束:$Last $GZDumpFile succ  $LogFile
cd $BakDir/daily
rm -f *

chmod a+x /home/mysql/databak.sh

vi /etc/crontab

#每个星期日凌晨3:00执行完全备份脚本
0 3 * * 0 /home/mysql/databak.sh >/dev/null 2>&1
#周一到周六凌晨3:00做增量备份
0 3 * * 1-6 /home/mysql/binlogbak.sh >/dev/null 2>&1

crontab /etc/crontab

crontab -l