Hello Girish, This is nothing but lookup join usecase.
Just do a quick search on joins using mapreduce. Regards, Jagat Singh ----------- Sent from Mobile , short and crisp. On 12-Jun-2012 6:31 PM, "Girish Ravi" <giri...@srmtech.com> 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 >
