xtrabackup增量备份
 
 mysql 增量备份策略 周一全备,其他增量备份,根据业务需要,设定保留日期,如保留一月。
 
增量备份步骤;
 
         1 创建全备 
          2 根据全备目录,创建增量备份
 
          3 第二次增量备份根据第一次增量备份目录,依次类推
 
下面是今天写的增量备份脚本,先在自己的测试机上跑几天。
 
#!/bin/sh
begintime=`date +"%Y-%m-%d %H:%M:%S"`
format_time=`date +"%Y-%m-%d_%H:%M:%S"`
week=`date +%w`
port=3306
#ip=
backdir=/backup
file_cnf=/etc/my.cnf
user_name=root
passwd=
out_log=$datadir/xtraback_log_$format_time
time_cost=$backdir/xtraback_time.txt
if [ ! -d "$backdir" ]; then 
     mkdir -p $backdir 
fi 
if [ -d "$backdir/rec5" ];then 
           rm -rf $backdir-bak
           mv $backdir $backdir-bak
           mkdir $backdir 
fi

#full backup 
if [ ! -d "$backdir/full" ];then 
    echo "#####start full backup at $begintime to directory full" >>$time_cost
    innobackupex --defaults-file=$file_cnf --no-lock --no-timestamp --user=$user_name --port=3306 $backdir/full 1>$out_log-full 2>&1
    tar -zcvf $backdir/full.tar.gz $backdir/full
    break;
    elif [ ! -d "$backdir/rec0" ];then 
    echo "######start 0 incremental backup at $begintime to directory rec0" >>$time_cost
    innobackupex --default-file=$file_cnf --no-lock --no-timestamp --user=$user_name --port=$port --incremental --incremental-basedir=$backdir/full $backdir/rec0 1> $out_log-rec0 2>&1
    break;
    elif [ ! -d "$backdir/rec1" ];then 
     echo "#######start 1 incremental backup at $begintime to directory rec1" >>$time_cost
     innobackupex --defaults-file=$file_cnf --no-lock --no-timestamp --user=$user_name --port=port --incremental --incremental-basedir=$backdir/full $backdir/rec1 1>$out_log-rec1 2>&1
     break;
     elif [ ! -d "$backdir/rec2" ]; then 
     echo "######start 2 incremental backup at $begintime to directory rec2" >>$time_cost
     innobackupex --defaults-file=$file_cnf --no-lock --no-timestamp --user=$user_name --port=port --incremental --incremental-basedir=$backdir/rec1 $backdir/rec2 1> $out_log-rec2 2>&1
     break;
     elif [ ! -d "$backdir/rec3" ]; then 
     echo "#######start 3 incremental backup at $begintime to directory rec3" >$time_cost
     innobackupex --defaults-file=$file_cnf --no-lock --no-timestamp --user=root --port=port --incremental --incremental-basedir=$/backdir/rec2 $backdir/rec3 1> $out_log-rec3 2>&1
     break;
     elif [! -d "$backdir/rec4" ];then 
     echo "########start 4 incremental backup at $begintime to directory rec4" >>$time_cost
     innobackupex --defaults-file=$file_cnf --no-lock --no-timestamp --user=root --port=port --incremental --incremental-basedir=$backdir/rec4 1> $out_log-rec4 2>&1
     break;
     elif [ ! -d "$backdir/rec5" ];then 
      echo "#######start 5 incremental backup at $begintime to directory rec5" >>$time_cost \
      innobackupex --defaults-file=$file_cnf --no-lock --no-timestamp --user=$user_name --port=port --incremental --incremental-basedir=$backdir/rec4 $backdir/rec5 1> $out_log-rec5 2>&1
      break;
    fi

 

还原步骤 
        1 关闭实例
 
        2 应用日志,如有增量,先恢复全备,然后再逐个恢复增量日志
 
        3 copy数据到目录 
        4 修改数据文件权限,chown、chmod 
        5 启动