Hi,

I am looking into using MapReduce Aggregation framework on top of my stored
data in MongoDB in different collections.

I want these MapReduce jobs Aggregation logic more customizable such that
it can be changed easily based on business rules. Is there any way you can
extract that MapReduce functionality or any tool which makes this possible.

I am a beginner MongoDB user so pardon my some terminology or understanding
of perfect concept behind MapReduce/MongoDB and if was not clear in my
question.

Thanks,
Vishal Mody

Depending on your exact needs, you may want to first check out
http://docs.mongodb.org/manual/applications/aggregation/, which is actually
distinct and faster than the Map/Reduce<http://www.mongodb.org/display/DOCS/MapReduce> functionality
built into MongoDB.  The MongoDB Aggregation Framework isn't as flexibile
as the full Javascript-based Map/Reduce MongoDB implementation, but it
offers plenty.

Do you have specific questions, queries, or use cases?  The group might be
able to recommend one or the other if you provide more detail.

-Stephen