TL;DR — Object Storage (S3)

Design a scalable object storage service similar to Amazon S3. Users can store and retrieve arbitrary binary objects (files) of any size (bytes to terabytes) organized into buckets. The system must provide 11 nines of durability (99.999999999%), meaning the probability of losing an object in a given year is 0.000000001%. Key features: PUT/GET/DELETE objects up to 5 TB in size organized in buckets. Multipart upload for objects > 100 MB (parallel chunk uploads).