[late2part]

AWS Advocates Eventual Consistency, and I believe offers less than 3 nines guaranteed uptime on many products.

We've been taught to build distributed system with unreliable componens and temporaral JIT eventual consistency.

Of course we can run production cloud-scale operations on unreliable systems. And single power supplies without ECC or RAID is pretty low on my list of things that cause outages. Most big hadoop/cassandra shops are running without raid and without redundant power.

[user5994461]

hadoop/cassandra are replicated to multiple nodes by the software. That's a terrible argument for not using any raid in regular setups.

[late2part]

I suspect your and my definition of regular setups is different. My regular setups are stateless and automatically installed and configured.

[user5994461]

Lucky you, never having to deal with any database or storage.