Spark Streaming - Watermarking for Late Data
• Watermarks define how long Spark Streaming waits for late-arriving data before finalizing aggregations, balancing between data completeness and processing latency
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PySpark - Streaming Watermark and Late Data
Watermarks solve a fundamental problem in stream processing: when can you safely finalize an aggregation? In batch processing, you know when all data has arrived. In streaming, data arrives…
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