> Another example is figuring out the right tradeoffs between using local SSD disks and block-storage services (AWS EBS and others).
Local disks on AWS are not appropriate for long term storage, because when an instance reboot the data will be lost. AWS also doesn't offer huge amounts of local storage.
yeah, that is part of the trade off. Using an ephemeral SSD (for a database) means the database needs to have another means of making the data durable (replication, storing data in S3, etc.).
There are AWS instance types (I3en) with large and very fast SSDs (many times higher IOPS then EBS).
> Another example is figuring out the right tradeoffs between using local SSD disks and block-storage services (AWS EBS and others).
Local disks on AWS are not appropriate for long term storage, because when an instance reboot the data will be lost. AWS also doesn't offer huge amounts of local storage.