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

Changes between Version 25 and Version 26 of waue/2009/0402


Ignore:
Timestamp:
Apr 2, 2009, 5:36:16 PM (17 years ago)
Author:
waue
Comment:

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  • waue/2009/0402

    v25 v26  
    235235Compiled by ndaley on Thu Jan 22 23:12:08 UTC 2009
    236236}}}
     237
     238= bin/hadoop 的管理者用法 =
     239
     240== balancer ==
     241 * 用來讓hdfs的資料能均勻分散
     242{{{
     243$ bin/hadoop balancer
     244}}}
     245
     246== daemonlog ==
     247
     248{{{
     249$ bin/hadoop daemonlog -getlevel gm1.nchc.org.tw:50070 dfshealth.jsp
     250
     251Connecting to http://gm1.nchc.org.tw:50070/logLevel?log=dfshealth.jsp
     252
     253Submitted Log Name: dfshealth.jsp
     254
     255Log Class: org.apache.commons.logging.impl.Log4JLogger
     256
     257Effective level: INFO
     258}}}
     259== datanode ==
     260
     261== dfsadmin ==
     262
     263== jobtracker  ==
     264
     265== namenode  ==
     266
     267== secondarynamenode ==
     268
     269== tasktracker ==
     270 * 不可直接下 bin/hadoop tasktracker 這個指令，下此指令的節點 tasktracker:50060 網頁會出現錯誤訊息
     271
     272
    237273= Hadoop Streaming 函式庫用法 =
    238274 * Hadoop streaming是Hadoop的一個工具， 它幫助用戶創建和運行一類特殊的map/reduce作業， 這些特殊的map/reduce作業是由一些可執行文件或腳本文件充當mapper或者reducer