About Me

Love JAVA related technologies. Recently researching on Enterprise Integration (SOA and Messaging), Mobility and Big Data. I have working in JAVA related technologies as Software Architect, Enterprise Architect and Software Developer/Engineer for over 11 years. Currently, I am working as Senior Consultant of VMWare Inc.

Tuesday, November 13, 2012

Hadoop commands

Usage: hadoop [--config confdir] COMMAND
where COMMAND is one of:
  • namenode                     format format the DFS filesystem
  • secondarynamenode     run the DFS secondary namenode
  • namenode                     run the DFS namenode
  • datanode                      run a DFS datanode
  • dfsadmin                      run a DFS admin client
  • fsck                             run a DFS filesystem checking utility
  • fs                                 run a generic filesystem user client
  • balancer                       run a cluster balancing utility
  • jobtracker                    run the MapReduce job Tracker node
  • pipes                            run a Pipes job
  • tasktracker                   run a MapReduce task Tracker node
  • job                               manipulate MapReduce jobs
  • version                         print the version
  • jar <jar>                       run a jar file
  • distcp <srcurl> <desturl> copy file or directories recursively
  • archive -archiveName NAME <src>* <dest> create a hadoop archive
  • daemonlog                     get/set the log level for each daemon
  • CLASSNAME              run the class named CLASSNAME

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