HardAI Evaluated

Design Cloud File Storage

Overview

Design a cloud storage system that allows users to upload, download, share, and synchronize large files across multiple devices with delta synchronization and conflict handling.

Requirements

1Upload and download files up to 10GB with chunked resumable transfers
2Delta Sync: when a file is edited, only upload/download the modified chunks rather than the entire file
3Real-time synchronization notifications across all connected client devices
4File version history (support restoring previous revisions and conflict resolution)
5End-to-end data integrity with cryptographic chunk validation (SHA-256)

Architecture Hints (4)

Target Concepts

#Chunking#Delta Sync#S3#Metadata DB#Conflict Resolution

Canvas Editor

Design Cloud File Storage

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