close Warning: Can't synchronize with repository "(default)" (Unsupported version control system "svn": /usr/lib/python2.7/dist-packages/libsvn/_core.so: failed to map segment from shared object: Cannot allocate memory). Look in the Trac log for more information.

Changes between Version 4 and Version 5 of waue/2009/0401


Ignore:
Timestamp:
Apr 1, 2009, 3:01:06 PM (17 years ago)
Author:
waue
Comment:

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  • waue/2009/0401

    v4 v5  
    22 = DFSAdmin 命令 =
    33
    4  * -report
     4 == -report ==
    55報告HDFS的基本統計信息。有些信息也可以在NameNode Web服務首頁看到
    66
    … …  
    2727   }}}
    2828
    29  * -safemode
     29 == -safemode ==
    3030雖然通常並不需要，但是管理員的確可以手動讓NameNode進入或離開安全模式。
    3131
    … …  
    3939{{{
    4040$ bin/hadoop dfsadmin -safemode enter
    41 
    4241Safe mode is ON
    43 
    44 
    4542$ bin/hadoop dfsadmin -safemode leave
    46 
    4743Safe mode is OFF
    4844}}}