SSDs Have Become Fast, Except in the Cloud

Re:SSDs Have Become Fast, Except in the Cloud by pclmulqdq on Tuesday February 20, 2024 @12:28PM (#39444065)

Reliability. SSDs break and screw up a lot more frequently and more quickly than CPUs. Amazon has published a lot on the architecture of EBS, and they go through a good analysis of this. If you have a broken disk and you locally attach, you have a broken machine.

RAID helps you locally, but fundamentally relies on locality and low latency (and maybe custom hardware) to minimize the time window where you get true data corruption on a bad disk. That is insufficient for cloud storage.

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Re:SSDs Have Become Fast, Except in the Cloud by vlovich123 on Tuesday February 20, 2024 @11:15PM (#39450096)

Sure, but there's plenty of software that's written to use distributed unreliable storage similar to how cloud providers write their own software (e.g. Kafka). I can understand if many applications are just need something like EBS that's durable but looks like a normal disk, but not so sure it's a fundamentally required abstraction.

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