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AWS Storage Services for Developers: S3, EBS, EFS Guide

DEV Community •
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The DEV Community module "Storage for Developers" equips learners with a developer‑centric view of Amazon Web Services storage offerings. It outlines why AWS provides multiple services—object (Amazon S3), block (Amazon EBS), and file (Amazon EFS)—to meet distinct application patterns such as high durability, low latency, and shared access. The curriculum details S3 fundamentals, including bucket architecture, storage classes, encryption options (SSE‑S3, SSE‑KMS, client‑side), and access controls via IAM and bucket policies, emphasizing that class selection influences cost without affecting durability.

Hands‑on labs guide participants through creating a secure bucket, enabling versioning, and programmatic access using the AWS CLI or SDK. EBS is presented as block storage scoped to a single EC2 instance, suitable for databases and boot volumes, while EFS is described as a managed NFS file system that scales automatically across multiple instances. The module also addresses cost drivers—storage volume, access frequency, data transfer, and API requests—and performance factors such as S3 prefix distribution, EBS volume type, and EFS throughput mode.

By mastering these services, developers can architect resilient, cost‑effective solutions aligned with modern cloud workloads.