Tiny Google Docs

Overview

This project is a simplified system design implementation of a real-time collaborative document editing system inspired by Google Docs. It focuses on how multiple users can edit the same document simultaneously while maintaining consistency and low-latency synchronization.

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Problem Statement

Real-time collaboration systems must handle concurrent edits from multiple users, resolve conflicts, and propagate changes instantly across clients. This project explores how to design a simplified collaborative document system that supports real-time editing, synchronization, and version consistency under concurrent access.

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Learning Objectives

• Understand real-time collaborative system design
• Learn how concurrency is handled in shared documents
• Explore conflict resolution strategies
• Understand event-driven synchronization between clients and servers
• Learn how state is propagated in real time
• Explore tradeoffs between consistency and latency
• Build intuition for distributed real-time systems

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Core Features

Document System

• Create and edit documents
• Store document state
• Retrieve document versions

Real-Time Collaboration

• Multiple users editing simultaneously
• Live updates across clients
• Cursor/presence awareness (conceptual or simplified)

Change Propagation

• Broadcast edits to connected clients
• Handle incremental updates (diff-based or operation-based)
• Maintain ordered update streams

Versioning

• Basic version history
• Snapshot-based or incremental version tracking
• Restore previous document states

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Architecture (Conceptual)

Client Layer

• Sends edits to server
• Receives real-time updates
• Maintains local document state

Collaboration Server

• Coordinates document state
• Broadcasts updates to connected clients
• Manages session connections

Data Layer

• Stores document content and versions
• Persists change history

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Engineering Considerations

• Handling concurrent edits from multiple users
• Consistency vs latency tradeoffs
• Conflict resolution strategies (last-write-wins, operational concepts)
• Network latency and update ordering
• State synchronization between clients
• Scalability of real-time connections

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Integration Ideas

• Message Queue (event propagation backbone)
• Distributed Lock (conceptual coordination layer)
• Caching (fast document state access)
• WebSocket systems (real-time communication layer)
• Monitoring (tracking edit latency and sync issues)

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Status

🟡 Planned