question Re: Writing a Map reduce code with larger and smaller file in Archives of Support Questions (Read Only)

Writing a Map reduce code with larger and smaller file

rakesh_an1992 — Thu, 05 Apr 2018 17:04:30 GMT

I have a large file of 5 GB which has detailed information about an Employee and also, i have 1 small file with 2 MB which has only employee names. I want to extract the employee names from the smaller file and do analysis on larger file using employee name. How can I do this in Map reduce ?

Re: Writing a Map reduce code with larger and smaller file

schhabra1 — Fri, 13 Apr 2018 03:17:32 GMT

---> Large file can be input to your Map Reduce program

----> Small file can be passed in distributed cache and can be loaded in List

----> Inside your mapper function, you can do comparisons(Input file vs List) or any other operation which you want.

Let me know if you need help in MR job.

Please post sample data for files and operation you want to perform.

Re: Writing a Map reduce code with larger and smaller file

schhabra1 — Thu, 19 Apr 2018 19:40:49 GMT

@Rakesh AN If above information helped you, Could you please accept answer?