Mysql 增量备份和全量备份

全量备份：

# vim /root/DBFullyBak.sh //添加以下内容
#!/bin/bash
# Program
#    use mysqldump to Fully backup mysql data per week!
# History
#    2013-04-27 guo     first
# Path
#  全备份:/home/mysql/backup   #  增量备份目录:/home/mysql/backup/daily
BakDir=/home/mysql/backup
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
/usr/local/mysql/bin/mysqldump -uroot -p123456 --quick --all-databases --flush-logs --delete-master-logs --single-transaction > $DumpFile
/bin/tar czvf $GZDumpFile $DumpFile
/bin/rm $DumpFile
Last=`date +"%Y年%m月%d日 %H:%M:%S"`
LogFile=/home/mysql/backup/bak.log
echo 开始:$Begin 结束:$Last $GZDumpFile succ >> $LogFile
cd $BakDir/daily
rm -f *

增量备份：

#!/bin/bash
# Program
#    use cp to backup mysql data everyday!
# History
#    2013-05-02 guo     first
# Path
#    ....
BakDir=/home/mysql/backup/daily
BinDir=/home/mysql/data
LogFile=/home/mysql/backup/bak.log
BinFile=/home/mysql/data/mysql-bin.index
/usr/local/mysql/bin/mysqladmin -uroot -p123456 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"` $Next Bakup succ! >> $LogFile

3.设置crontab任务，每天执行备份脚本
代码如下:
# crontab -l 　　
#每个星期日凌晨6:00执行完全备份脚本
0 6 * * 0 /root/DBFullyBak.sh >/dev/null 2>&1
#周一到周六凌晨6:00做增量备份
0 6 * * 1-6 /root/DBDailyBak.sh >/dev/null 2>&1