我们有一个hadoop集群，它有2个名称节点（active standby）和12个数据节点
所有12个数据节点机器都有用于hdfs的磁盘
我们在 hadoop namenode -recover ，因为我们怀疑有损坏的文件，如fsimage\u0000000000001253918或edits\u0000000000001203337-0000000000001214475等
因此，要恢复hdfs元数据，我们可以执行以下操作

$ hadoop namenode -recover
DEPRECATED: Use of this script to execute hdfs command is deprecated.
Instead use the hdfs command for it.

21/01/19 17:56:35 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   user = hdfs
STARTUP_MSG:   host = master1.sys67.com/17.2.12.78
STARTUP_MSG:   args = [-recover]
STARTUP_MSG:   version = 2.7.3.2.6.5.0-292

21/01/19 17:56:35 INFO namenode.NameNode: createNameNode [-recover]
You have selected Metadata Recovery mode.  This mode is intended to recover lost metadata on a corrupt filesystem.  Metadata recovery mode often permanently deletes data from your HDFS filesystem.  Please back up your edit log and fsimage before trying this!

Are you ready to proceed? (Y/N)
 (Y or N) y

问题是：
此操作是否也会影响数据节点计算机上的数据本身？
或者只是namenode机器上的元数据？