pos-system/services/ads-serving-service-net/docs/en/ARCHITECTURE.md

Ads Serving Service Architecture

Overview

graph LR
    REQ[Ad Request] --> GW[Gateway]
    GW --> CACHE[Redis Cache]
    CACHE --> AUC[Auction]
    AUC --> RESP[Response]
    RESP --> EVT[Async Events]

eCPM Calculation

eCPM = (Bid × Predicted_CTR × 1000) + Quality_Score

Redis Data Structures

Key	Type	TTL
ads:active:{placement}	Sorted Set	5 min
freq:{userId}:{date}	Hash	24h
budget:{campaignId}:{date}	String	24h

Latency Budget

Phase	Target
Redis lookup	< 5ms
Auction logic	< 20ms
Total	< 100ms