MicroNugget: What is MapReduce?

You guys are awesome and gives the best explanations in every video.

Such simple explanation provided for something I have been struggling to understand for last 2 days despite of watching several videos and reading forums/blogs. The only thing I still don't understand is why do we need to seperate that data blocks using MapReduce. Why can't we retrieve it back as the same way we put in? Does it mean it takes unstructured data and filters out with results of structured data? Thanks.

This is pretty much the best high level video on MapReduce out there.

best explanation out of all the MapReduce videos. thank you guys!

The only understandable-straight to the point video, thank you.