No, we did not ever consider ceph. rsync.net architecture is purely FreeBSD and there was just a very good fit - and roadmap - from UFS2 which we used from 200

No, we did not ever consider ceph. rsync.net architecture is purely FreeBSD and there was just a very good fit - and roadmap - from UFS2 which we used from 2001-2012 and ZFS which we have used since. Also, for better or worse, rsync.net is about UNIX and ZFS is very unixy. We think in filesystems and files and directories and ZFS let's us keep that set of abstractions.