Idempotency: Safely Handling Duplicate Requests

Understanding idempotency concepts and implementation through practical experience

August 29, 2025

Codemapo

Computer Science·February 5, 2025

CPU vs GPU: One Einstein vs 10,000 Elementary Students (Deep Dive)

Why did AI and deep learning abandon CPUs for GPUs? From ALU architecture to CUDA memory hierarchy and generative AI principles.

#cs#hardware#cpu#gpu

CPU vs GPU: One Einstein vs 10,000 Elementary Students (Deep Dive)

Computer Science·July 7, 2025

Sharding: Horizontal Partitioning

Understanding database sharding and handling massive traffic through practical experience

#database#sharding#scalability#distributed-systems

Computer Science·February 15, 2026

API Security in Practice: Rate Limiting, API Keys, and IP Restrictions

Public APIs face unexpected traffic floods without proper protection. Rate limiting, API key management, and IP restrictions to protect your API.

#API Security#Rate Limiting#API Key#Security

API Security in Practice: Rate Limiting, API Keys, and IP Restrictions

Computer Science·February 14, 2026

RBAC vs ABAC: Designing Fine-Grained Access Control

Started with admin/user roles but requirements grew complex. When RBAC isn't enough, ABAC provides attribute-based fine-grained control.

#RBAC#ABAC#Authorization#Security

RBAC vs ABAC: Designing Fine-Grained Access Control

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Final Recommendations

Start Small: Begin with your most critical endpoints (payments, orders)
Monitor: Track duplicate request rates to understand retry patterns
Document: Make it clear in your API docs that clients should use idempotency keys
Test: Simulate network failures and verify idempotency works correctly
Educate: Ensure your team understands why and how to use idempotency

Idempotency isn't just a nice-to-have feature—it's essential for building reliable distributed systems. The small upfront investment in implementing it properly will save you countless hours of debugging and customer support down the line.