DynamoDB vs MongoDB NoSQL
I'm trying to figure it out what can I use for a future project, we plan to store from about 500k records per month in the first year and maybe more for the next years this is a vertical application so there's no need to use a database for this, that's the reason why I decided to choose a noSQL data storage.
The first option that came to my mind was mongo db since is a very mature product with a lot of support from the community but in the other hand we got a brand new product that offers a managed service at top performance, I'll develop this application but there's no maintenance plan (at least for now) so I think that will be a huge advantage since amazon provides a elastic way to scale.
My major concern is about the query structure, I haven't looked at the dynamoDB query capabilities yet but since is a k/v data storage I feel that this could be more limited than mongo db.
If someone had the experience of moving a project from mongoDB to DynamoDB, any advice will be totally appreciated.
Answer
I know this is old, but it still comes up when you search for the comparison. We were using Mongo, have moved almost entirely to Dynamo, which is our first choice now. Not because it has more features, it doesn't. Mongo has a better query language, you can index within a structure, there's lots of little things. The superiority of Dynamo is in what the OP stated in his comment: it's easy. You don't have to take care of any servers. When you start to set up a Mongo sharded solution, it gets complicated. You can go to one of the hosting companies, but that's not cheap either. With Dynamo, if you need more throughput, you just click a button. You can write scripts to scale automatically. When it's time to upgrade Dynamo, it's done for you. That is all a lot of precious stress and time not spent. If you don't have dedicated ops people, Dynamo is excellent.
So we are now going on Dynamo by default. Mongo maybe, if the data structure is complicated enough to warrant it, but then we'd probably go back to a SQL database. Dynamo is obtuse, you really need to think about how you're going to build it, and likely you'll use Redis in Elasticcache to make it work for complex stuff. But it sure is nice to not have to take care of it. You code. That's it.