1. MongoDB MapReduce is much slower than pure Java processing? stackoverflow.com
I wanted to count all key's of my documents (inclusive embedded ones) of a collection. First I wrote a Java client to solve this. It took less than 4 seconds to ...
2. how to compute the average with mongodb and NumberLong stackoverflow.com
I am trying to compute an average value from a collection using the mongodb java driver, like this:
3. How do I pass parameters to Mongodb map/reduce in Java? stackoverflow.com
I have some data like this:
Where I ...
4. MongoDB's MapReduce function in Java returns null stackoverflow.com
I've some test data in my MongoDB: