Step 1 of 12 · Intro

Design object storage (S3-like) and pastebin

Start with a pastebin, grow it into a durable store for files of any size.

How it works

• ›Write: create an object or upload a big file in parts (rare, large).
• ›Read: fetch by key, often the same popular objects (read-heavy).
• ›Keep: never lose a byte, even when disks and servers die.

What you'll build

1. The API and the metadata-versus-blob data model
2. A cached metadata path for a viral paste
3. Object storage for bytes, with a CDN for reads
4. Replication for metadata, and designs that survive a cold CDN, a lost storage node and a lost primary