Blob store

Store large, immutable, unstructured objects — images, video, backups, model weights, document blobs — in a flat namespace keyed by a string, replicated for durability and served by direct download. Getting it wrong means stuffing multi-megabyte blobs into a row-oriented database (where they bloat the working set, wreck cache locality, and cap throughput) or hand-rolling a file server that loses data on the first disk failure.

When to reach for this

Objects are large (KB to GB), written once and read many times, and you only ever fetch them whole by key — never query inside them. Photo/video stores, user uploads, backups, data-lake/ML datasets, static-site assets, log archives. The access pattern is PUT key → GET key, durability matters, and the total volume is too large or too cold to sit in a primary database.