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Storage System Design Case Studies

11 Storage case studies from OpenAI with full breakdowns.

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Instagram
17 min readDistributed SystemsMediaSearch
Advanced+2▶ Mock
Calendar Service (Google Calendar)
6 min readSchedulingDistributed SystemsStorage
Intermediate+2▶ Mock
CI/CD Platform (GitHub Actions / Jenkins)
7 min readSchedulingDistributed SystemsStorage
Advanced▶ Mock
Cloud Development Environment (Codespaces / Replit / DevBox)
7 min readDistributed SystemsSecurityScheduling
Advanced▶ Mock
Digital Game Store and Distribution Platform (Steam)
6 min readE-commercePaymentsCDN
Intermediate▶ Mock
Duplicate File Detection at Scale
6 min readStorageAlgorithmsDistributed Systems
Intermediate▶ Mock
IoT / Sensor Telemetry Pipeline
7 min readIoTData PipelinesStorage
Intermediate+1▶ Mock
Object Storage Service (Amazon S3) with Deduplication
6 min readStorageDistributed SystemsAPI Design
Advanced▶ Mock
AI Prompt Playground (OpenAI / Anthropic Console)
6 min readAI / MLFrontendStorage
Intermediate▶ Mock
Text-to-Video Generation Service (Sora)
6 min readAI / MLSchedulingDistributed Systems
Advanced▶ Mock
URL Shortener (TinyURL / bit.ly)
7 min readDistributed SystemsCachingStorage
Beginner+4▶ Mock

Frequently Asked Questions

What is Storage in system design?

Storage is a core system design topic covered in 43 case studies on InterviewSkool. It appears frequently in FAANG interviews, especially at Google, Amazon, and Meta.

How should I prepare Storage for system design interviews?

Study the case studies above, focusing on architecture trade-offs, scale estimates, and API designs. Practice explaining your decisions aloud — this is exactly what interviewers evaluate.

Practice with a Mock Interview

Apply these Storage case studies in a live system design mock interview with InterviewSkool's AI interviewer.

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