Implement File Deduplication and Compression

[AnshSinghSonkhia]

Priority: Medium
Category: Storage Optimization
Estimated Effort: Medium

Description

Enhance storage efficiency through advanced deduplication and compression:

• Block-level deduplication
• Compression before storage
• Delta compression for similar files
• Storage usage optimization

Implementation Plan

1. Block-Level Deduplication (dedup/)

   • Split files into fixed-size blocks
   • Calculate block hashes for deduplication
   • Reference counting for shared blocks
   • Garbage collection for unreferenced blocks

2. Compression Integration

   • Add compression layer before encryption
   • Support multiple algorithms (gzip, lz4, zstd)
   • Configurable compression levels
   • Automatic algorithm selection based on content

3. Delta Compression

   • Identify similar files using fuzzy hashing
   • Store deltas instead of full files
   • Reconstruct files from base + delta

4. Storage Analytics

   • Track deduplication ratios
   • Monitor compression effectiveness
   • Storage usage reports

Files to Create/Modify:

• dedup/chunker.go - File chunking logic
• dedup/index.go - Block index management
• compression/ - Compression algorithms
• store.go - Integrate deduplication and compression