I'm considering MongoDB right now. Just so the goal is clear here is what needs to happen:
In my app, Finch (finchformac.com for details) I have thousands and thousands of entries per day for each user of what window they had open, the time they opened it, the time they closed it, and a tag if they choose one for it. I need this data to be backed up online so it can sync to their other Mac computers, etc.. I also need to be able to draw charts online from their data which means some complex queries hitting hundreds of thousands of records.
Right now I have tried using Ruby/Rails/Mongoid in with a JSON parser on the app side sending up data in increments of 10,000 records at a time, the data is processed to other collections with a background mapreduce job. But, this all seems to block and is ultimately too slow. What recommendations does (if anyone) have for how to go about this? Seems like CouchDB can be better in this case.
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