Comment by im_down_w_otp

Bitcask, now there's a blast from the Basho past. It always bugged me that no good secondary indexing strategy was built to make using Bitcask viable for more use cases. Everyone always wanted to use the LevelDB backend just to get at secondary indexing features (which also performance scaled inversely relative to cluster size, which was it's own problem). But having Riak exhibit consistent, high-performance was waaaaaaaay easier on Bitcask.