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Deduplicate Events

Eliminate duplicate events from distributed systems with at-least-once delivery guarantees.

The Problem​

At-least-once delivery creates inevitable duplicates:

  • Network retries create identical events
  • Load balancer failovers duplicate actions
  • Duplicates corrupt analytics, trigger redundant actions, waste processing
  • No exactly-once guarantee

The Solution​

Learn 4 deduplication strategies:

  1. Hash-Based Deduplication - SHA-256 content hashing with in-memory cache for exact duplicates
  2. Fingerprint-Based Deduplication - Hash business-critical fields for semantic duplicate detection
  3. ID-Based Deduplication - Cache event ID directly for systems with guaranteed unique IDs
  4. Production Configuration - Redis-backed cache with consistent hashing for multi-node deployments

Get Started​

Choose your path:

Interactive Explorer​

See each deduplication strategy with side-by-side before/after views

Step-by-Step Tutorial​

Build the pipeline incrementally:

  1. Hash-Based
  2. Fingerprint-Based
  3. ID-Based
  4. Production

Complete Pipeline​

Download the production-ready solution