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From Adarsh Sharma <adarsh.sha...@orkash.com>
Subject Re: How to Achieve TaskTracker Decommission
Date Thu, 06 Jan 2011 12:17:08 GMT
sandeep wrote:
>  
>
> Hi 
>
>  
>
> Can any one  you let me know what command do I need to execute  for
> Decommissioning TaskTracker?
>
>  
>
> Datanode decommissioning I have achieved using hadoop dfsadmin
> -refreshNodes. 
>
>  
>
> Similar to HDFS is there any command for Mapreduce Decommission.
>
>  
>
> I have gone through the defect [HADOOP-5643 ] ..but I was unable to find
> what command I need to execute.
>
>  
>
> I have tried ./mapred jobtracker -decommission  but not working .
>
>  
>   

There is no command  in HDFS like this .

U must specify the hosts to exclude in mapred.hosts.exclude parameter in 
mapred.site.xml
And

hadoop dfsadmin -refreshNodes. 
 

is sufficient to do the work.


> Please help me .
>
>  
>
> Thanks
>
> sandeep
>
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