Glossary term
What is S3 (Simple Storage Service)?
S3 stands for Simple Storage Service.
In DevOps
File storage. Images, PDFs, uploads, backups — anything that is a file rather than a database row.
Learn it properly · DevOpsLesson 11: S3 and CloudFront: Static Assets and CDNUploads, images and built assets in S3, served from edge locations near your users.In System Design
Amazon's object storage (and the de facto API standard). Example: Profile photos and backups.
Learn it properly · System DesignLesson 17: Object Storage: How S3-Style Storage WorksImages saved to a server's disk vanish when you add a second server. How S3-style object storage keeps files safe at any scale, why uploads should skip your servers entirely, and what belongs in the database instead.