Downtime but limited downtime since the data is stored with triple redundancy across multiple machines in the same AZ. So unless the AZ goes down (which is a different failure than what happened here) you can restart the DB on a different instance pretty quickly and I'm guessing AWS will do it automatically for you.

I don't believe their RDS / EBS has 3x redundancy. With SSD, that would be super costly for them. But if that's correct, that would be incredible.

May not be 3x but it is replicated so even a total instance failure would not make you lose data:

>Amazon EBS volumes are designed to be highly available, reliable, and durable. At no additional charge to you, Amazon EBS volume data is replicated across multiple servers in an Availability Zone to prevent the loss of data from the failure of any single component. For more details, see the Amazon EBS Service Level Agreement.

https://aws.amazon.com/ebs/features/#Amazon_EBS_availability...

> Maybe not with Aurora

If a read replica fails, I'd expect no downtime (possibly a few errors as connections get cut off abruptly). Although there's always the risk that the remaining instances aren't able to handle the additional load.

If the master fails, you'll get a ~2min downtime

Yeah but you won't lose your data. They have backup infrastructure and EBS is rock solid.

Down time is one thing. Data loss is something else.