[ceph-users] Is metadata on SSD or bluestore cache better?

Hi, I hope this mailgroup is ok for this kind of questions, if not please ignore. I'm currently in the process of planning a smaller ceph cluster mostly for cephfs use. The budget still allows for some SSD's in addition to the required harddisks. I see two options on how to use  those, a) Make SSD only pools for the cephfs metadata b) Give every OSD a SSD for the bluestore cache I was not able to find any suggestions or benchmarks so far, does anyone has further resources or insight into those options? Greetings, Kai