As the title says, this is yet-another-tutorial on Map Reduce using MongoDB. But two things that are different here:
- A problem solving approach is used, so we’ll take a problem, solve it in SQL first and then discuss Map Reduce.
- Lots of diagrams, so you’ll hopefully better understand how Map Reduce works.
If MapReduce still didn’t click, you could try this SQL to MongoDB MapReduce guide.
Original title and link: MongoDB Map Reduce: Yet another tutorial (NoSQL databases © myNoSQL)