Amazon S3 Introduction - Overview

Study Files

Section Purpose

Amazon S3 is one of the main building blocks of AWS — infinitely scaling object storage. Many websites and AWS services use S3 as a backbone.

Key Concepts at a Glance

Amazon S3
├── Buckets (top-level containers)
│   ├── Globally unique name
│   ├── Defined at region level
│   └── Naming: lowercase, 3-63 chars, no IP
├── Objects (files)
│   ├── Key = full path (prefix + object name)
│   ├── Max size: 5 TB
│   ├── Multi-part upload if > 5 GB
│   └── Metadata, Tags, Version ID
├── Security
│   ├── IAM Policies (user-based)
│   ├── Bucket Policies (resource-based, JSON)
│   ├── ACLs (legacy, can be disabled)
│   ├── Block Public Access settings
│   └── Encryption
├── Features
│   ├── Static Website Hosting
│   ├── Versioning (bucket-level)
│   └── Replication (CRR / SRR)
└── Storage Classes
    ├── Standard
    ├── Standard-IA
    ├── One Zone-IA
    ├── Glacier Instant Retrieval
    ├── Glacier Flexible Retrieval
    ├── Glacier Deep Archive
    └── Intelligent-Tiering

S3 Use Cases

Related Sections

• Classic Solutions Architecture
• EBS Overview
• Amazon EFS