MySql的全量备份和增量备份及还原

MySql的全量备份和增量备份及还原

1、工做场景

.MySql早上2点进行全量备份

.每隔2小时进行一次增量备份

2、设计思路

.利用全备份文件中记录CHANGE MASTER语句，binlog文件及其位置点信息，找出binlog文件中增量的部分。

.用mysqlbinlog命令上述的binlog文件导出为sql文件，并剔除其中drop语句

.经过全量备份和增量binlog文件的导出sql，能够恢复完成的数据

3、全量备份

.脚本

#!/bin/bash
# program :use mysqldump to Fully backup mysql data per day!
# path :全备份,路径：/data/mysql/backup/daily
BakDir=/data/mysql/backup/daily
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
Last=date + “%Y-%m-%d %H:%M:%S”
logFile=/data/mysql/backup/daily/bak.log
echo 开始:$Begin 结束:$Last $GZDumpFile succ >>$logFile

4、增量备份

#!/bin/bash
BakDir=/data/mysql/backup/hour
BinDir=/usr/local/mysql/data
logFile=/data/mysql/backup/hour/bak.log
BinFile=/usr/local/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.*文件
Counter=wc -l $BinFile | awk '{print $1}’ NextNum=0 #for循环用于对比$Counter,$NextNum 这两个值来肯定文件是否是存在或最新的 for file in cat$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-%m-%d %H:%M:%S” $NextNum Bakup succ! >>$logFile

5、彻底备份

# mysql -u root -p < full_bak.sql

6、增量备份

#mysqlbinlog –no-defaults /data/mysql/backup/hour/mysql-bin.000058 | mysql -uroot -p12345 -v finance

问题记录：

1）binlog 包unknown variable ‘default-character-set=utf8’

方法1：

    在/etc/my.cnf 中将default-character-set=utf8修改为charater-set-server=utf8

方法2：

    mysqlbinlog --no-defaults mysql-bin.00000