> A global distributed ledger is less cumbersome to develop and more efficient to run, when it uses a transactional NoSQL database, than a blockchain. In other

> A global distributed ledger is less cumbersome to develop and more efficient to run, when it uses a transactional NoSQL database, than a blockchain. In other words, a distributed system is less cumbersome if it is centralized. Blockchain is a very expensive technique, but it's the first attempt at developing document timestamping system (one that doesn't need trusted third party) that produced at least mildly robust protocol.