[jacobwg]

Not sure how common the use-case is, but we're using Ceph to effectively roll our own EBS inside AWS on top of i3en EC2 instances. For us it's about 30% cheaper than the base EBS cost, but provides access to 10x the IOPS of base gp3 volumes.

The downside is durability and operations - we have to keep Ceph alive and are responsible for making sure the data is persistent. That said, we're storing cache from container builds, so in the worst-case where we lose the storage cluster, we can run builds without cache while we restore.