write amplification

I wrote something down on Github and would love to hear your feedback.

Hi, i have this equipment 4 hdd 2Tb 2 consumer ssd samsung 1Tb 1 consumer ssd 256Gb 2 ssds of 1TB each are combined into a mirror and a system is installed on them 4 hdd merged into raid10 and 256gb ssd connected to them as l2arc cache When I did this assembly I did not know about such a...

The last weeks I did 172 benchmarks to find out why my write amplification is so horrible and to see what storage setup might work better. In this thread I will try to summerize all the tests and explain what I learned so far. Edit: Will post link when finished.