I am a newbie in hadoop framework. So it would help me if someone can guide me thru this. I have two type of files. dirA/ --> file_a , file_b, file_cdirB/ -->... moreI am a newbie in hadoop framework. So it would help me if someone can guide me thru this. I have two type of files. dirA/ --> file_a , file_b, file_cdirB/ --> another_file_a, another_file_b...Files in directory A contains tranascation information.So something like: id, time_stamp 1 , some_time_stamp 2 , some_another_time_stamp 1 , another_time_stampSo, this kind of information is scattered across all the files in dirA. Now 1st thing to do is: I give a time frame (lets say last week) and I want to find all the unique ids which are present between that time frame.So, save a file.Now, dirB files contains the address information. Something like: id, address, zip code 1, fooadd, 12345 and so onSo all the unique ids outputted by the first file.. I take them as input and then find the address and zip code.basically the final out is like the sql merge.Find all the unique ids between a time frame and then merge the address infomration.I would greatly appreciate any help. Thanks less