In my experience with Riak, it absolutely lived up to its promise of scale, even if single-request speed was never quite as zippy as anyone would have liked. H

In my experience with Riak, it absolutely lived up to its promise of scale, even if single-request speed was never quite as zippy as anyone would have liked. However, the Dynamo design is just borderline unpalatable from a developer's perspective. I enjoy being aware of exactly the trade-offs being made, and Basho was always really open about it, but I don't blame anyone for not wanting to dig deep in the weeds to make it work for fairly common use cases.