The kind folks at O'Reilly sent me a fantastic book about MongoDB. This was a great read since it’s suited for people who do Operations and Development and Performance tuning (me). I've been using Cassandra for quite some time now (months lol) and the thing that has irritated me about Cassandra is the documentation for it. Cassandra documentation sucks, its hard to speed up on the internals. This MongoDB book is written by the most active participants that are developing MongoDB and the knowledge shows. What I like is it starts out on how to quickly get it up, add/get/update data to the DB. Then progresses to more advance topics-that talk about GridFS and MongoDB drivers. Personally I would like to see more elaboration of this facet in terms of motivation of why do this, what the win is and how it fits into the "Fast by Default" mantra. Each step is organized perfectly, and detailed with nice graphics that illustrate the document store or the flow of data from a systems view. When looking at the documentation on mongodb.org I see the same sort of clarity in this book. Comparing other NoSQL information, I do not see this transparency, which is rather frustrating because the learning curve is much larger. I'm so impressed with the info, and test results around the web that I'm moving to add this to my environment. Does this mean I'll get rid of my current Cassandra deployment? Probably not since its working great for my needs now.
Overall, great book, great info, intelligently presented with a straightforward explanation of how MongoDB works.
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