Ceph clusters are normally installed on many single nodes. For in order to achieve high performance and an efficient erasure coding, the overall number of nodes matters. On the other hand this makes only sense for a high capacity.
Ambedded has developed an interesting alternative: in a 1 U server enclosure eight independent nodes are integrated, each with its own processor, a disk and an M.2 flash card for cache. Each single node can be individually configured, as storage or monitoring node, this is done with a management software.
Thus with three enclosures a complete, redundant cluster van be build, having one monitoring node in each enclosure (enough for a quorum) and seven storage nodes, e.g. with 2+1 erasure coding. Then two running enclosures are sufficient to keep all data available.
Optionally these systems can also be delivered with SUSE Enterprise Linux including SUSE support.