The Lineage Graph is a directed acyclic graph (DAG) in Spark or PySpark that represents the dependencies between RDDs (Resilient Distributed Datasets) or DataFrames in a Spark application. In this article, we shall discuss in detail what is Lineage Graph in Spark/PySpark, and its properties, ...
* map(func) :对源DStream的每个元素,采用func函数进行转换,得到一个新的DStream; * flatMap(func): 与map相似,但是每个输入项可用被映射为0个或者多个输出项; * filter(func): 返回一个新的DStream,仅包含源DStream中满足函数func的项; * repartition(numPartitions): 通过创建更多或者更少的分区改变DStrea...