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From Michel Segel <michael_se...@hotmail.com>
Subject Re: How to mapreduce in the scenario
Date Tue, 29 May 2012 10:32:17 GMT
Hive? 
Sure.... Assuming you mean that the id is a FK common amongst the tables...

Sent from a remote device. Please excuse any typos...

Mike Segel

On May 29, 2012, at 5:29 AM, "liuzhg" <liuzhg@cernet.com> wrote:

> Hi,
> 
> I wonder that if Hadoop can solve effectively the question as following:
> 
> ==========================================
> input file: a.txt, b.txt
> result: c.txt
> 
> a.txt:
> id1,name1,age1,...
> id2,name2,age2,...
> id3,name3,age3,...
> id4,name4,age4,...
> 
> b.txt: 
> id1,address1,...
> id2,address2,...
> id3,address3,...
> 
> c.txt
> id1,name1,age1,address1,...
> id2,name2,age2,address2,...
> ========================================
> 
> I know that it can be done well by database. 
> But I want to handle it with hadoop if possible.
> Can hadoop meet the requirement?
> 
> Any suggestion can help me. Thank you very much!
> 
> Best Regards,
> 
> Gump
> 
> 
> 

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