Hi list, for multiple project-level file shares (with individual access rights) I am planning to use CephFS. Technically this can be implemented both with multiple toplevel cephfs or with a single cephfs in the cluster and subvolumes. What is the preferred choice? I have not found any guidance in docs.ceph.com <http://docs.ceph.com/>. The only location that suggests to use subvolumes is https://www.ibm.com/docs/en/storage-ceph/8.1.0?topic=systems-cephfs-volumes-.... However, how can I avoid that only one MDS is responsible for serving all subvolumes? Is there some current literature (books or web docs) that contain recommendations and examples? A couple of ceph-related books are available in well-known online book stores, but many of them are rather old (6 years or even more). Thanks a lot, Sophonet