Anyone care to describe their experiences?
I'd like to store billions of smallish files (photos etc) in production. Price (incl bandwidth) is important, but uptime and latency (where S3 does suffer) are more important.
If you have your own hardware, Ceph is solid.
I wouldn't put more than 200 million objects in a single bucket, but other than that it can be very reliable.
I have ~ half an exabyte on-prem, and sleep very well at night.