MyRocks is the RocksDB storage engine for MySQL. It will soon be available inproper distributions. I will explain when and why it can be useful. I willalso cover the features it has, features we are working on and features it ismissing. The short version of the story is that it provides the best spaceefficiency, better write efficiency and good read efficiency. But performancein practice has more nuance and I hope to help you to understand how toevaluate it.