High-Risk, High-Scale: Guaranteeing Ad Budget Precision at 1 Million Events/Second

Flipkart serves thousands of sponsored ads across various pages and with search queries. Advertisers are charged based on the impression views or clicks generated by their campaign content. In the high-velocity domain of AdTech, the latency between an ad impression/click and a budget deduction represents a direct financial risk. If the system lags, advertisers overspend; if it blocks, revenue is…

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