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From Allen Wittenauer <awittena...@linkedin.com>
Subject Re: Decomishining a node
Date Fri, 23 Apr 2010 18:31:03 GMT

On Apr 23, 2010, at 10:48 AM, Raymond Jennings III wrote:

> I've got a dead machine on my cluster.  I want to safely update HDFS so that nothing
references this machine then I want to rebuild it and put it back in service in the cluster.
> 
> Does anyone have any pointers how to do this (the first part - updating HDFS so that
it's no longer referenced.) 

1. Add node to dfs.exclude
2. hadoop dfsadmin -refreshNodes

That will start the decommissioning process.

When you want to add it back in, remove it from dfs.excluce and re-run refreshnodes.
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