[more_corn]

Ideally you offer developers both a relational data store and a fast key-value data store. Train your developers to understand the pros and cons and then step back.

There’s nothing inherently wrong with a big db instance. The cloud providers have fantastic automation around multi-az masters, read replicas and failover. They even do cross region or cross account replication.

That being said. Multi PB would raise an eyebrow.

[derekperkins]

Most relational databases are fast enough for smaller key/value. Replace key/value with a blob store (still technically k/v) and I'm onboard