Xuechao Serial War
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The document compares serialization formats JSON, Avro, and Protobuf by measuring size, latency, and throughput. It finds that JSON has around 50% larger size but 34% lower latency than Avro, while Protobuf has slightly higher size than Avro but 17% higher latency. It recommends JSON for latency-critical lightweight data, Avro for data-heavy real-time applications, and Protobuf for applications heavily relying on Google services needing perfect documentation.
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Xuechao Serial War
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- 8. AverageByKey latency_stream = message_DStream. map(lambda x:json.loads(x)). //x:{json} map(lambda x:(math.ceil(time.time()),time.time()-x["time"])). //(key_time,latency) combineByKey(lambda value: (value, 1),lambda x, value: (x[0] + value, x[1] + 1),lambda x, y: (x[0] + y[0], x[1] + y[1])). //(key_time, (value,1)) -> (key_time,(sum,count)) -> (key_time,(sum,count)) map(lambda (label, (value_sum, count)): (label, value_sum / count)) //(time,averaged_latency)
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