Ceph, OpenStack Swift, GlusterFS, OrangeFS, Lustre.
https://en.wikipedia.org/wiki/Clustered_file_system#Distribu...
https://en.wikipedia.org/wiki/Clustered_file_system#Distribu...
I write this not as storage religion (of which there's far too much), but to warn away those who haven't experienced the many kinds of data (and stomach lining) loss that come with being a Lustre admin.
http://sector.sourceforge.net/
I swore I added it to the Wikipedia links. I'll have to do it again, I guess.