[HPDD-discuss] Are snapshots and clones filesystem-wide in ZFS-backed Lustre clusters

Hi everyone, This is a cross-post from http://serverfault.com/questions/495966/are-snapshots-and-clones-filesyst... . I'm looking for a distributed filesystem on Linux that supports ZFS-like lightweight snapshots and snapshot clones, and I'm trying to figure out whether Lustre + ZFS is the solution. If I set up a ZFS-backed distributed Lustre filesystem, will I be able to snapshot it, and then mount and clone those snapshots? Or would the ZFS snapshot features operate at the level of individual OSS's rather than across the entire distributed filesystem? Many thanks, Anand Patil