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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "FAQ" by KonstantinShvachko
Date Thu, 04 Dec 2008 17:28:23 GMT
Dear Wiki user,

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The following page has been changed by KonstantinShvachko:
http://wiki.apache.org/hadoop/FAQ

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  bin/hadoop dfsadmin -refreshNodes
  }}}
  should be called, which forces the name-node to re-read the exclude file
+ and start the decommission process.
+ 
+ Decommission does not happen momentarily since it requires replication of potentially a
large number of blocks 
+ and we do not want the cluster to be overwhelmed with just this one job.
+ The decommission progress can be monitored on the name-node Web UI. 
+ Until all blocks are replicated the node will be in "Decommission In Progress" state.
+ When decommission is done the state will change to "Decommissioned". 
- and start the decommission process. The nodes can be removed whenever decommission is finished.
+ The nodes can be removed whenever decommission is finished.
  
- Decommission does not happen momentarily since we do not want the cluster to be overwhelmed
with just this one job.
  The decommission process can be terminated at any time by editing the configuration or the
exclude files 
  and repeating the {{{-refreshNodes}}} command.
  

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