FAQ

On Sat, Jun 8, 2013 at 4:36 AM, Dhanasekaran Anbalagan wrote:
Hi Guys,

I modified some property via CM. for example mapred.reduce.tasks I modified
some value. and restarted mapreduce service and restarted hole cluster
also. configuration not effected. why?
Depends on the config. Some config affect the server-side, for which
you need a service restart/refresh. Some affect the clients, for which
you need to redeploy the client configuration.

The default number of reducers (mapred.reduce.tasks) is a client
config. (You can also tell because it's associated with gateway
roles.) In general, jobs themselves specify the number of reducers
they want.

Cheers,
bc
After went for action, started Deploy Client Configuration. after restarted
mapreduce service. configuration value effected.

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postedJun 8, '13 at 11:37a
activeJun 8, '13 at 8:39p
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Dhanasekaran Anbalagan: 1 post bc Wong: 1 post

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