I had one of those moments today, Slightly buried in the FAQ, for Red Hat buying Inktank, there was this two sentence summary that makes the relationship between Gluster and Ceph/Inktank clear:
Inktank has a more mature block interface and OpenStack integration, while Gluster has a more mature file system interface and traditional web storage integration. Therefore, the two complement each other very well and we believe the combination is a very attractive alternative to traditional proprietary storage.To me, that was the Ah-Ha! description that I needed. Sometimes I wish there was a place that had these sort of short nutshell summaries that was written by technical people for technical people.