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From Devaraj k <devara...@huawei.com>
Subject RE: How To Distribute One Map Data To All Reduce Tasks?
Date Thu, 05 Jul 2012 06:06:27 GMT
Can you explain your usecase with some more details?



Thanks

Devaraj

________________________________
From: 静行 [xiaoyong.dengxy@taobao.com]
Sent: Thursday, July 05, 2012 9:53 AM
To: mapreduce-user@hadoop.apache.org
Subject: 答复: How To Distribute One Map Data To All Reduce Tasks?

Thanks!
But what I really want to know is how can I distribute one map data to every reduce task,
not one of reduce tasks.
Do you have some ideas?

发件人: Devaraj k [mailto:devaraj.k@huawei.com]
发送时间: 2012年7月5日 12:12
收件人: mapreduce-user@hadoop.apache.org
主题: RE: How To Distribute One Map Data To All Reduce Tasks?


You can distribute the map data to the reduce tasks using Partitioner.  By default Job uses
the HashPartitioner. You can use custom Partitioner it according to your need.



http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/mapreduce/Partitioner.html



Thanks

Devaraj

________________________________
From: 静行 [xiaoyong.dengxy@taobao.com]
Sent: Thursday, July 05, 2012 9:00 AM
To: mapreduce-user@hadoop.apache.org
Subject: How To Distribute One Map Data To All Reduce Tasks?
Hi all:
         How can I distribute one map data to all reduce tasks?

________________________________

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