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Number of Reducers

Mohamed El-Refaey
Ranch Hand

Joined: Dec 08, 2009
Posts: 119
Are there any limits to number of Reducers in Hadoop? and what are the best practice to design the mappers and reducers in Hadoop environments?

Regards,
Mohamed


Best Regards, Mohamed El-Refaey
www.egyptcloudforum.com
Arun Vasu
Greenhorn

Joined: Oct 05, 2010
Posts: 24

The best practise is to keep the number of redulers slightly less than the number of available reduce slots in your cluster.
Get more info from Hadoop wiki
Mohamed El-Refaey
Ranch Hand

Joined: Dec 08, 2009
Posts: 119
Arun Vasu wrote:The best practise is to keep the number of redulers slightly less than the number of available reduce slots in your cluster.
Get more info from Hadoop wiki


Thanks Arun, I got it!
 
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subject: Number of Reducers