Ayende @ Rahien

Hi!
My name is Oren Eini
Founder of Hibernating Rhinos LTD and RavenDB.
You can reach me by phone or email:

ayende@ayende.com

+972 52-548-6969

, @ Q c

Posts: 5,972 | Comments: 44,523

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Map/Reduce visualizer, take II


Yes, I talked about this already, but we made some additional improvements that make it even cooler.

Here is a document:

image

And here is the index:

image

Now, let us look at what happens when we go to the map/reduce visualizer:

image

This is a highly zoomed out picture, let us zoom a little (click it for higher zoom):

image

As you can see, we can see all the documents that have any reduce keys shared with the reduce keys from the document we started from. That is going to make explaining, and debugging, map/reduce so much easier.

For that matter, here is an example of the visualizer showing us a multi step reduce. Which is an optimization that happens when we have a lot of entries for the same reduce key. Now we can actually show you how this works:

image

Pretty cool!


Comments

Mike H

This is really useful... I need 3!!! :P

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