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Storage

Core

Amazon EFS

Elastic Regional shared NFS file storage for Linux workloads across Availability Zones.

Key points

  • EFS supports concurrent shared file access without pre-provisioning a fixed filesystem size.
  • Performance/throughput and storage-class behavior should match access concurrency and active data.
  • Mount targets, networking, file-system policy, access points, encryption, and backup complete the design.

Best-known use cases

  • Share Linux files across a multi-AZ EC2 or container fleet.
  • Store elastic shared application content and home directories.

What candidates often confuse it with

  • EFS is shared Linux file storage; EBS is attached block storage.
  • EFS supplies general NFS; FSx supplies workload-specific managed file systems.

Key takeaway

Choose EFS for elastic shared Linux file semantics across multiple compute targets.

Related services

  • Amazon EBS
  • Amazon FSx (for all types)
  • AWS Backup

Relevant exam tasks

  • D2.1
  • D3.1
  • D4.1

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Free AWS Certified Solutions Architect - Associate prep

Build focused SAA-C03 quizzes from skill areas, topics, and product references.

Practice with exam-style multiple-choice and multiple-response questions, score breakdowns, explanations, and a compact reference for this lane's official exam domains.

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Exam Weights

Exam snapshot

SAA-C03 at a glance

Category
Associate
Duration
130 minutes
Questions
65 total; 50 scored and 15 unidentified unscored
Formats
Multiple choice and multiple response
Scoring
100–1,000 scaled score; 720 minimum passing score

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Exam fidelity: AWS documents 65 questions in 130 minutes: 50 scored and 15 unidentified unscored, using multiple-choice and multiple-response formats. This site's practice accuracy and readiness do not reproduce AWS's 100–1,000 scaled scoring or identify unscored items. Difficulty labels describe this site's Associate-level scenario complexity, not an AWS-published question rating.

Reference

SAA-C03 topics and reference map

Study links

SAA-C03 resources

Official AWS resources

SAA-C03 official exam guide

The live AWS guide with target candidate, exam mechanics, task statements, domain weights, and current service scope.

AWS Solutions Architect - Associate certification

Official certification overview, scheduling details, exam logistics, and preparation path.

AWS Skill Builder SAA-C03 Exam Prep Plan

Official SAA-C03 preparation plan and entry point for AWS exam-prep learning resources.