I am writing new join algorithm using hadoop
and want to do multi way join in single mapreduce job
map --> processes all dataset
reduce-->  join of all dataset
                + aggregate operation

second mapreduce job

will collect result from multple reducer files of first job

I am pretty clear about map phase but dnt have idea how to process
all dataset in single reduce.

So how i should proceed and
do i need to modify code of mapreduce
Thanks

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*
*
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Thanx and Regards*
* Vikas Jadhav*

http://www.theserverside.com/discussions/thread.tss?thread_id=62376

Hope this helps.

From: Vikas Jadhav [mailto:[EMAIL PROTECTED]]
Sent: Saturday, January 19, 2013 9:29 AM
To: [EMAIL PROTECTED]
Subject: new join algorithm using mapreduce

I am writing new join algorithm using hadoop
and want to do multi way join in single mapreduce job

map --> processes all dataset
reduce-->  join of all dataset
                + aggregate operation
second mapreduce job
will collect result from multple reducer files of first job
I am pretty clear about map phase but dnt have idea how to process
all dataset in single reduce.
So how i should proceed and
do i need to modify code of mapreduce

Thanks

--
Thanx and Regards
 Vikas Jadhav