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So a single cluster produces those keys? I thought it’s more decentralized.

• quantumofalpha 5y ago
  With random database keys I would think they can just be generated at random by any frontend server running anywhere. Ultimately, a request to insert that key would come to the database - which is the centralized gatekeeper in this design and can accept or reject it. But with replication, sharding, caching even SQL databases scale extremely well. Just avoid expensive operations like joins.