Howard I always found your benchmarks as well as your comments and explanations of the results to be very thorough and easy to understand. So thanks for that. I wonder if you had a look at ForestDB which is also based on a B+-tree like structure instead of LSM and claims to have very low write amplification. They have published benchmarks[1] but there is no LMDB or WiredTiger included.

[1] https://github.com/couchbaselabs/forestdb/wiki/Performance-R...