I have got a POC up and running locally without any compression or optimization and its sitting at 1.3x of the source file size. The next step is to move into building out a dev cluster with 7tb of data. I am trying to come up with an estimate as to how much storage I will need. Replication isn't necessary. Just the bare minimum estimate...Ive seen estimate ranges from 1.1x - 2.5x.