Very inspiring work and achievement. It is perhaps the equivalent of the application of quantum mechanics during the middle to late twentieth century. As such, perhaps "decentralized general computing" is more plausible than I thought.
As the authors themselves point out, none of the fundamental building blocks of this system are particularly new. For example, the idea of partitioning a very large dataset into lots of independent slices, each of which is handled by its own Paxos group, is the same idea that forms the basis of Google's Megastore and Spanner, the former of which is more than a decade old.
Most of the interesting stuff in this paper is the discussion of the nuts-and-bolts of software engineering, such as testing, deployment and monitoring.
For open source solutions, BeeGFS.
If you want to pay and you are IBM fan, GPFS.