Yes. the problem with "eventual consistency" is that "eventually" never happens about 1 in a million times, and with millions of storage objects to manage you c

Yes. the problem with "eventual consistency" is that "eventually" never happens about 1 in a million times, and with millions of storage objects to manage you can't have that. So what's the alternative as a metadata store for object storage ? a consensus algorithm (paxos, raft, mencius, ...) on top of local key value stores.