[ceph-users] Mount CEPH-FS on multiple hosts with concurrent access to the same data objects?

I'm new on the list, so a "Hello" to all! :-) We're planning a Proxmox-Cluster. The data-center operator advised to use a virtual machine with NFS on top of a single CEPH-FS instance to mount the shared CEPH-FS storage on multiple hosts/VMs. As this NFS/CEPH-FS-VM could be a bottle-neck I was wondering if CEPH- FS is capable to manage concurrent access and locking itself. Is it possible to mount CEPH-FS instances on multiple hosts (e.g. /srv) all accessing the same data objects without data-loss or dead-locks by concurrent access? Will this perform better than a single NFS/CEPH-FS instance (VM)? Thanx for any hint Renne