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mysql 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/shbegintime=`date +"%Y-%m-%d %H:%M:%S"`format_time=`date +"%Y-%m-%d_%H:%M:%S"`week=`date +%w`port=3306#ip=backdir=/backupfile_cnf=/etc/my.cnfuser_name=rootpasswd=out_log=$datadir/xtraback_log_$format_timetime_cost=$backdir/xtraback_time.txtif [ ! -d "$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
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