zoukankan      html  css  js  c++  java
  • 何时使用hadoop fs、hadoop dfs与hdfs dfs命令

    hadoop fs:使用面最广,可以操作任何文件系统。

    hadoop dfs与hdfs dfs:只能操作HDFS文件系统相关(包括与Local FS间的操作),前者已经Deprecated,一般使用后者。


    以下内容参考自stackoverflow

    Following are the three commands which appears same but have minute differences

    1. hadoop fs {args}
    2. hadoop dfs {args}
    3. hdfs dfs {args}

      hadoop fs <args>
      

    FS relates to a generic file system which can point to any file systems like local, HDFS etc. So this can be used when you are dealing with different file systems such as Local FS, HFTP FS, S3 FS, and others

      hadoop dfs <args>
    

    dfs is very specific to HDFS. would work for operation relates to HDFS. This has been deprecated and we should use hdfs dfs instead.

      hdfs   dfs <args>
    

    same as 2nd i.e would work for all the operations related to HDFS and is the recommended command instead of hadoop dfs

    below is the list categorized as HDFS commands.

      **#hdfs commands**
      namenode|secondarynamenode|datanode|dfs|dfsadmin|fsck|balancer|fetchdt|oiv|dfsgroups
    

    So even if you use Hadoop dfs , it will look locate hdfs and delegate that command to hdfs dfs



  • 相关阅读:
    赛前一个月
    Barricade---hdu5889(最短路+网络流)
    Tea---hdu5881(规律)
    The Best Path---hdu5883(欧拉路径)
    Cure---hdu5879(打表+找规律)
    Python列表操作
    Zabbix在Docker中的应用和监控
    flannel网络设置
    Volume
    Service资源清单
  • 原文地址:https://www.cnblogs.com/jediael/p/4304098.html
Copyright © 2011-2022 走看看