在Hadoop中清除DFS [英] Wiping out DFS in Hadoop

问题描述

如何清理Hadoop中的DFS？ b
$ b

1. 从每个节点中删除主hadoop存储目录。此目录由hdfs-site.xml中的hadoop.tmp.dir属性定义。

重新设置namenode的格式：

  hadoop namenode -format 
  

如果你只做（2），它将只删除由namenode存储的元数据，但不会摆脱所有的临时存储和datanode块。

How do I wipe out the DFS in Hadoop?

解决方案

You need to do two things:

1. Delete the main hadoop storage directory from every node. This directory is defined by the hadoop.tmp.dir property in your hdfs-site.xml.

2. Reformat the namenode:

hadoop namenode -format

If you only do (2), it will only remove the metadata stored by the namenode, but won't get rid of all the temporary storage and datanode blocks.

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