With the cloud hype the distributed file systems became quite hip too. This topic has been seriously picked by commercial Linux vendors too. Hence, distributed file systems like CephFS and/or Glusterfs will come to the majority of data centers and/or companies around the world. Distributed file systems change quite a bit how storage has to be managed and operated. Using CephFS and GlusterFS this talk will describe their key features and will show the commonalities and differences of them from a datacenter operations point of view. Some basic file system and storage knowledge is useful.