18-Flash-Sale-Inventory

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Gaps & Roadmap Improvements ​

This document lists architectural improvements ranked by priority for future production iterations.

Priority 0: Critical for Multi-Node Production ​

  1. Distributed Redis Queue for Waiting Room: Currently WaitingRoomManager holds queue tickets in local process RAM. In a multi-node deployment, moving queue state to Redis Sorted Sets (ZADD / ZRANGE) will allow horizontal scaling across 20+ FastAPI nodes.
  2. Asynchronous Payment Message Broker: Direct synchronous calls to external payment gateways create latency bottlenecks. Integrating Apache Kafka or AWS SQS will decouple order placement from payment capture.

Priority 1: High Operational Value ​

  1. Server-Sent Events (SSE) / WebSocket Push: Replace the 3-second client polling in frontend/src/app.js with SSE streams, reducing unnecessary HTTP request overhead on the /dashboard/stock endpoint.
  2. Automated Deadlock Detection & Backoff: Add automated circuit breakers around Postgres query retries if lock wait timeouts exceed 500ms.

Priority 2: Security & Polish ​

  1. Hardware Security Fingerprinting: Enhance anti-scalper scoring with client-side WebAssembly hardware fingerprinting.
  2. Multi-Region Active-Passive Database Replication: Set up automated cross-region read replicas with automated failover.