pyspark.streaming.DStream.countByValueAndWindow

DStream.countByValueAndWindow(windowDuration, slideDuration, numPartitions=None)

Return a new DStream in which each RDD contains the count of distinct elements in RDDs in a sliding window over this DStream.

Parameters

windowDurationint

width of the window; must be a multiple of this DStream’s batching interval

slideDurationint

sliding interval of the window (i.e., the interval after which the new DStream will generate RDDs); must be a multiple of this DStream’s batching interval

numPartitionsint, optional

number of partitions of each RDD in the new DStream.