Hi, I assembled a small Proxmox 4.1 cluster (3 Proxmox nodes + 1 NFS server for backup) using 1Gbit ethernet. All 3 nodes run OSDs (1x2T disks) with 10G SSD partitions for Journaling. My VMs use ceph rbd for storage. Now, I want to use SSDs for caching (either using free space on the Journaling SSDs or buying new SSDs), which is faster/better: Use SSD as Flashcache (or some similar solution). In this case, would Proxmox be able to use this Flashcache in my VMs running on rbd (I only saw examples using local storage not ceph)? Use SSD as Cache Tiering in Ceph (one cache per node). BTW, is Proxmox planning to support Docker in the near future? Dilvan.