Take a look at this: "Content Model, or Replication on IPFS" https://github.com/ipfs/faq/issues/47 -- it's a discussion on WHY we had to separate out the replication part. Check out also:

- ipfs-cluster - discussion on a tool we'll build to replicate archives to many nodes and have a RAID-like cluster configuration - https://github.com/ipfs/notes/issues/58

- ipfs-persistence-consortium - https://github.com/pipermerriam/ipfs-persistence-consortium

- pincoop - https://github.com/victorbjelkholm/pincoop

- http://filecoin.io (long term solution)

- more at https://news.ycombinator.com/item?id=11137313