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endice

大家好,关于 mongodb 误删数据存放文件夹的补救方法~~

  •  1
     
  •   endice Apr 17, 2017 6460 views
    This topic created in 3299 days ago, the information mentioned may be changed or developed.

    如题,我把 mongodb 启动时-dbpath 指定的目录删除了,请问有什么办法补救吗?现在 mongodb 里面还有数据,但我不清楚重启之后是不是就会丢失了....

    Supplement 1    Apr 17, 2017
    感谢大家的帮助,数据已经完美恢复。
    我先用 mongodump 备份数据,然后另起一个数据库,用 mongorestore 恢复,经测试数据正常!
    11 replies    2017-04-17 21:07:06 +08:00
    freestyle
        1
    freestyle  
       Apr 17, 2017
    knightdf
        2
    knightdf  
       Apr 17, 2017
    千万别重启
    endice
        3
    endice  
    OP
       Apr 17, 2017
    @freestyle 我有个疑问,就是我现在还可以用 mongodump 备份数据,那我重启后不是可以恢复吗?
    TangMonk
        4
    TangMonk  
       Apr 17, 2017 via Android
    @freestyle
    @endice mongo 是把数据存在内存的吗?就和 redis 一样?
    XiaoxiaoPu
        5
    XiaoxiaoPu  
       Apr 17, 2017
    @endice mongod 还有打开的 fd ,所以文件还没实际删除,一旦你重启 mongod , fd 被关闭了,文件没有被引用就会真正删掉了。
    endice
        6
    endice  
    OP
       Apr 17, 2017
    @XiaoxiaoPu 那 mongodump 的方法可行吗?
    freestyle
        7
    freestyle  
       Apr 17, 2017
    @endice mongodump 是从 mongod 中获取数据的,可以 先 dump 下来保存文件确认数据对不对,重启后再 mongorestore 回去
    XiaoxiaoPu
        8
    XiaoxiaoPu  
       Apr 17, 2017
    @endice 可行,不过 1 楼已经给出直接恢复数据文件的方法了,可以照着做一下。记住一定不要重启。
    freestyle
        9
    freestyle  
       Apr 17, 2017
    @TangMonk 这是 linux 系统机制 文件被进程打开的时候被删除后只有这个进程能还能看到数据 一旦此进程结束后系统才会真正从磁盘删除
    TangMonk
        10
    TangMonk  
       Apr 17, 2017 via Android
    @freestyle 那还能写入数据吗
    freestyle
        11
    freestyle  
       Apr 17, 2017
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