Hands On System Design - Distributed Systems Implementation

Hands On System Design - Distributed Systems Implementation

Day 69: Building GDPR-Compliant Log Processing - The Right to be Forgotten

254-Day Hands-On System Design Series: Module 3 - Advanced Log Processing Features

Jul 19, 2025
∙ Paid

Today's Mission: Making Your Users Disappear (The Right Way)

Imagine you're Netflix and a user decides to delete their account. They don't just want their profile gone - they want every trace of their viewing history, preferences, and behavioral patterns erased from your distributed log processing system. This isn't just good customer service; it's the law under GDPR.

Today we're building a sophisticated data erasure system that can selectively remove user data across your entire distributed log processing infrastructure while maintaining system integrity and audit compliance.

What You'll Build:

  • User data identification and tracking system

  • Selective data removal across distributed components

  • Audit trail for compliance verification

  • Data anonymization vs complete deletion logic

  • Cross-system coordination for erasure requests


The GDPR Reality Check

GDPR's "right to be forgotten" isn't just about deleting a database record. In distributed log processing systems, user data fragments exist across multiple components: raw logs, processed analytics, cached results, backup systems, and derived insights. Each fragment must be identified, evaluated, and either removed or anonymized.

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