Hi, I'm using stable/rocky to try ceph cache tiering. Now I'm facing a one issue. I chose one SSD to become cache tier disk. And set below options in globals.yml. ceph_enable_cache = "yes" ceph_target_max_byte= "<size num>" ceph_target_max_objects = "<object num>" ceph_cache_mode = "writeback" And the default OSD type is bluestore. It will bootstrap the cache disk and create another OSD container. And also create the root bucket called "cache". then set the cache rule to every cache pools. The problem is, that OSD didn't stay at "cache" bucket, it still stay at "default" bucket. That caused the services can't access to the Ceph normally. Especially deploying Gnocchi. When error occurred, I manually set that OSD to the cache bucket then re-deploy, and everything is normal now. But still a strange issue that it stay in the wrong bucket. Did I miss something during deployment? Or what can I do? Many thanks, Eddie.