MySQL增量备份异地备份

#!/bin/sh #MySQL Info sqluser=root sqlpsw=root #sqluser2=root #sqlpsw2=root POSITION=/home/backup/position if test ! -e $POSITION then #echo "The first time daily backup, the file of position deesn't exist or it's content is null" mysql -u$sqluser -p$sqlpsw -e "show master status\G;" --default-character-set=gbk | awk '{print $2}' | sed -n '2,3p' > $POSITION else DATADIR=/data/mysql BAKDIR=/home/backup/mysql/daily TEMPDIR=/home/backup/mysql/temp DATABASE1=a DATABASE2=b startbinlog=$(sed -n '1p' $POSITION) startposition=$(sed -n '2p' $POSITION) #echo "startbinlog: "$startbinlog #echo "startposition: "$startposition rm -rf $POSITION mysql -u$sqluser -p$sqlpsw -e "show master status\G;" --default-character-set=gbk | awk '{print $2}' | sed -n '2,3p' > $POSITION stopbinlog=$(sed -n '1p' $POSITION) stopposition=$(sed -n '2p' $POSITION) #echo "stopbinlog: "$stopbinlog #echo "stopposition: "$stopposition /usr/bin/mysqladmin -u$sqluser -p$sqlpsw flush-logs --default-character-set=GBK #/usr/bin/mysqladmin -u$sqluser2 -p$sqlpsw2 flush-logs --default-character-set=GBK BINLOGNAME='mysql-bin' cd $DATADIR FILELIST=$(cat $BINLOGNAME.index | cut -c3-) if test "startbinlog" = "$stopbinlog" then #echo "startbinlog = stopbinlog" mysqlbinlog --start-position=$startposition --stop-position=$stopposition -d $DATABASE1 $startbinlog >> $TEMPDIR/$DATABASE1$(date +%y%m%d)1.sql mysqlbinlog --start-position=$startposition --stop-position=$stopposition -d $DATABASE2 $startbinlog >> $TEMPDIR/$DATABASE2$(date +%y%m%d)1.sql else startline=$(awk "/$startbinlog/{print NR}" $DATADIR/$BINLOGNAME.index) stopline=$(wc -l $DATADIR/$BINLOGNAME.index | awk '{print $1}') #echo "startline: "$startline #echo "stopline: "$stopline for i in $(seq $startline $stopline) do binlog=$(sed -n "$i"p $DATADIR/$BINLOGNAME.index | sed 's/.\///g') #binlog=$(sed -n "$i"p $DATADIR/$BINLOGNAME.index | cut -c3-) #echo "binlog: "$binlog case "$binlog" in "$startbinlog") mysqlbinlog --start-position=$startposition -d $DATABASE1 $binlog >> $TEMPDIR/$DATABASE1$(date +%y%m%d)$i.sql mysqlbinlog --start-position=$startposition -d $DATABASE2 $binlog >> $TEMPDIR/$DATABASE2$(date +%y%m%d)$i.sql;; "$stopbinlog") mysqlbinlog --stop-position=$stopposition -d $DATABASE1 $binlog >> $TEMPDIR/$DATABASE1$(date +%y%m%d)$i.sql mysqlbinlog --stop-position=$stopposition -d $DATABASE2 $binlog >> $TEMPDIR/$DATABASE2$(date +%y%m%d)$i.sql;; *) mysqlbinlog -d $DATABASE1 $binlog >> $TEMPDIR/$DATABASE1$(date +%y%m%d)$i.sql mysqlbinlog -d $DATABASE2 $binlog >> $TEMPDIR/$DATABASE2$(date +%y%m%d)$i.sql;; esac done #echo "backup mysql binlog ok" fi sleep 2s cd $TEMPDIR #delete last daily backup tar files rm -rf daily$DATABASE1$(date -d "-1 day" +%y%m%d).tar.gz rm -rf daily$DATABASE2$(date -d "-1 day" +%y%m%d).tar.gz tarname1=daily$DATABASE1$(date +%y%m%d).tar.gz tarname2=daily$DATABASE2$(date +%y%m%d).tar.gz tar czf $tarname1 ./$DATABASE1* tar czf $tarname2 ./$DATABASE2* sleep 1s #ftp Info ftphost=11.11.11.11 ftpname=dal ftppsw=psw REMOTEDIR=dailybackup ftp -i -n <<! open $ftphost user $ftpname $ftppsw type binary cd $REMOTEDIR put $tarname1 put $tarname2 close bye ! sleep 10s #echo "end upload" #cd $TEMPDIR rm -rf $DATABASE1* rm -rf $DATABASE2* #echo "end" fi 

  

说明：

 

show master status：该命令查看当前的binlog及position。

 

mysqladmin -u$sqluser -p$sqlpsw flush-logs：mysql自动把内存中的日志放到日志文件binlog的最后一个文件里,并生成一个空的新日志文件,之后只需要备份前面的几个即可,最后一个因为是刚生成的，并且是空的，所以不需备份。

关于binlog可参考http://cxhyrf-sina-com.iteye.com/blog/1680055

大概思路：

    在备份之前需先执行一次。第一次执行备份时，利用show master status获得startbinlog、startposition，并放到position文件中；之后每次执行，都获取当前的binlog、position作为stopbinlog、stopposition，并放到position文件中，之后flush-logs。利用startbinlog、startposition、stopbinlog、stopposition及binlog即可导出相应的sql，之后压缩、ftp，然后就ok了。