pyspark.streaming.DStream.countByValueAndWindow¶
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DStream.countByValueAndWindow(windowDuration: int, slideDuration: int, numPartitions: Optional[int] = None) → pyspark.streaming.dstream.DStream[Tuple[T, int]]¶ 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.