After another round of performance tuning HAMMER all my benchmarks show HAMMER within 10% of UFS's performance, and it beats the shit out of UFS in certain tests such as file creation and random write performance. Read performance is good but drops more then UFS under heavy write loads (but write performance is much better at the same time). I am making progress with blogbench. It turns out that HAMMER isn't quite as horrible as it first appeared. What was happeni...