[Jouvence]

Lustre is not aligned at all with your requirements, so forget that one.

Ceph is much more complex than Gluster, but also more capable.

Honestly unless you are dealing with hundreds of TB of storage (and therefore need multiple servers anyway), I expect the complexity any distributed file-system adds is going to be detrimental to uptime and stability more often than it provides extra resilience. Use a single box with ZFS if you can, and add Gluster on top only if it can't be avoided.

[fulafel]

And even if you need hundreds of TB of storage, in many cases it might be better to just shard over normal storage and use your backups in case of failures. Current disks are big so you don't need too many for eg 200 TB.