pyspark.RDD.sumApprox

RDD.sumApprox(timeout: int, confidence: float = 0.95) → pyspark.rdd.BoundedFloat

Approximate operation to return the sum within a timeout or meet the confidence.

New in version 1.2.0.

Parameters

timeoutint

maximum time to wait for the job, in milliseconds

confidencefloat

the desired statistical confidence in the result

Returns

BoundedFloat

a potentially incomplete result, with error bounds

See also

RDD.sum()

Examples

>>> rdd = sc.parallelize(range(1000), 10)
>>> r = sum(range(1000))
>>> abs(rdd.sumApprox(1000) - r) / r < 0.05
True

pyspark.RDD.sum pyspark.RDD.take