Real-Time Ad Click Aggregator

Scalable Ads Click Aggregation System

Design a high-throughput system to aggregate ad clicks for real-time advertiser dashboards. The system must handle a peak of 1 million clicks per second, provide sub-minute latency for reports, and ensure exactly-once processing for accurate billing. Address challenges such as late-arriving data, hot-key distributions for viral ads, and high-availability storage for time-series aggregates.
KafkaApache FlinkCassandraRedisNoSQLAPI GatewayTime-series StorageKappa Architecture
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Real-Time Ad Click Aggregator

Design a high-throughput system capable of aggregating ad clicks and views in real-time. The system must join two distinct data streams—ad events and user action events—based on a shared identifier. It should support multi-dimensional aggregation (e.g., by geography and user profile) and provide low-latency results for analytical dashboards. Key considerations include handling out-of-order events, ensuring exactly-once processing for financial accuracy, and managing the state required for joining events that may occur far apart in time.
Apache FlinkKafkaClickHouseRocksDBS3ProtobufOLAPCDC
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