Requirements Document
Comprehensive requirements for the File Storage Service in the KnowledgeTracker Platform.
1. Functional Requirements
1.1 File Upload & Management
- •Multipart file upload for large files (up to 5GB)
- •Drag-and-drop file upload interface
- •File type validation and size limits
- •Folder/directory structure for organization
- •File versioning and revision history
- •Rename, move, copy, and delete file operations
1.2 Access Control & Permissions
- •Private, public, and shared file visibility settings
- •Role-based access control (owner, editor, viewer)
- •Shareable links with expiration dates
- •Password-protected file sharing
- •Organization-wide storage quotas and limits
1.3 File Processing & Preview
- •Thumbnail generation for images and videos
- •In-browser preview for documents (PDF, Office files)
- •Video transcoding for web-friendly formats
- •Image optimization and compression
- •Document text extraction for search indexing
1.4 Download & Delivery
- •Direct download and streaming capabilities
- •Bulk download as ZIP archive
- •Resume-able downloads for large files
- •CDN delivery for fast global access
- •Bandwidth throttling and rate limiting
1.5 Storage Analytics
- •Storage usage by user and organization
- •File type distribution and popular content
- •Download statistics and access logs
- •Unused or orphaned file detection
1.6 Multi-Tenant Storage
- •Isolated storage buckets per organization
- •Organization-specific storage quotas and policies
- •Custom retention and deletion policies
2. Non-Functional Requirements
2.1 Performance
- •Upload speed up to 100MB/s for large files
- •File listing and metadata retrieval < 500ms
- •CDN cache hit rate > 90% for popular files
2.2 Scalability
- •Support for petabytes of total storage
- •Horizontal scaling with object storage (S3, MinIO)
- •Auto-scaling for traffic spikes
2.3 Reliability
- •99.99% file availability and durability
- •Geographic replication for disaster recovery
- •Automated backup and versioning
- •Checksum verification for data integrity
2.4 Security
- •Encryption at rest (AES-256) and in transit (TLS)
- •Virus and malware scanning on upload
- •DLP (Data Loss Prevention) for sensitive content
- •Secure signed URLs with expiration
2.5 Compliance
- •GDPR compliance for data storage and deletion
- •COPPA compliance for educational content
- •Data residency options (EU, US, Asia)
3. Integration Requirements
3.1 Internal Microservices
- •Content Delivery: Course material storage
- •Assessment Engine: Assignment submission files
- •User Management: Profile pictures and documents
- •Certificate Generation: Certificate PDF storage
3.2 External Services
- •Object Storage: AWS S3, Google Cloud Storage, MinIO
- •CDN: CloudFlare, AWS CloudFront, Fastly
- •Virus Scanning: ClamAV, VirusTotal API
Requirements Validation
Use this requirements document alongside the Database Design to validate:
- ✓File metadata storage (name, size, type, owner)
- ✓Permission and access control schema
- ✓Version history and audit trail tables
- ✓Storage quota tracking per organization