If your data is growing at this rate (and you plan to keep this data around), you'd want a distributed database that can scale to terabytes. But it might be ov

If your data is growing at this rate (and you plan to keep this data around), you'd want a distributed database that can scale to terabytes. But it might be overkill if you dont care for data consistency (i.e., you dont need to read it "right away" after you do a write): If you just want reports (and are okay getting them in the matter of minutes), then you can continue storing them in flat files and using apache HIVE/PIG-equivalent software (or whatever equivalent is hot right now, im out of date on this class of software). If you want a really good out-of-box solution for storage + data processing, google cloud products might be a really good bet.