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.