MooseFS
Fault tolerant, POSIX-compliant, network distributed filesystem
... links (file names pointing to target files, not necessarily on MooseFS) and hard links (different names of files which refer to the same data on MooseFS)
* Access to the file system can be limited based on IP address and/or password
MooseFS on GitHub:
https://github.com/moosefs/moosefs
Packages repository, download:
https://moosefs.com/download
Documentation:
https://moosefs.com/support
Recent changes:
https://github.com/moosefs/moosefs/blob/master/NEWS