mysql备份每个库下面每个表

#!/bin/bash
 MYUSER="root"
 MYPASS="123456"
 HOST="localhost"
 BACKUPDIR="/backup_mysql"
 DATE=`date -I`
 RETENTION=20
 #MYSQLDATA="/var/lib/mysql"
 [ ! -d $BACKUPDIR/$DATE ] && mkdir -p $BACKUPDIR/$DATE
 DBS=`mysql -u$MYUSER -p$MYPASS -Bse "show databases"|grep -v "information_schema" |grep -v "test"`
 for db_name in $DBS
   do
     mkdir -p $BACKUPDIR/$DATE/$db_name
     tables=`mysql -u$MYUSER -p$MYPASS -Bse "use $db_name;show tables"`
     for table_name in $tables
       do
     mysqldump -u$MYUSER -p$MYPASS -h$HOST --single-transaction --master-data=2 $db_name $table_name >$BACKUPDIR/$DATE/$db_name/$table_name.sql
     done
  done