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MapReduce >> mail # user >> Need logical help


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Re: Need logical help
Hello Girish,

This is nothing but lookup join usecase.

Just do a quick search on joins using mapreduce.

Regards,

Jagat Singh

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Sent from Mobile , short and crisp.
On 12-Jun-2012 6:31 PM, "Girish Ravi" <[EMAIL PROTECTED]> wrote:

>  Hi All,
>
> I am thinking of a condition where the data in two log files are to be
> compared, can I use Map-Reduce to do this?
>
> I have one log file (LOG1) which has user ID and dept ID and another log
> file (LOG2) has some rows which has user ID and dept ID and other data.
> Can I compare the data where LOG1.userID = LOG2.userID and LOG1.deptID > LOG2.deptID?
>
> If so any suggestion to implement the mapper for this?
>
> Regards
> Girish
> Ph: +91-9916212114
>