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> Apollo, Facebook’s Paxos-like NoSQL database ...

> supports anything from a minimum of three servers to thousands

Sorry, you don't run Paxos on thousands of servers. Typical Paxos cluster sizes are 5-7. The algorithm would never converge if you did run it on thousands of servers.

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Well, I wouldn't judge the software on the basis of the article. The words "Paxos-like database" are enough of a tip-off that it's not exactly going for rigorous technical accuracy.

It's sharded, dude. You may want (typically) 3, 5 or 7 machines per shard for redundancy and failover, but there's no limit on the number of shards you may want to have.

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