Wow, looks like a great product! That's a great idea to use NFS as the protocol. I honestly hadn't thought of that.

Perfect.

For IBM, I wrote a crypto filesystem that works similarly in concept, except it was a kernel filesystem. We crypto split the blocks up into 4 parts, stored into cache. A background daemon listened to events and sync'ed blocks to S3 orchestrated with a shared journal.

It's pure magic when you mount a filesystem on clean machine and all your data is "just there."