摘要：
MapReduce provides a programming model that abstracts the problem form disk reads and writes, transforming it into computation over sets of keys and v 阅读全文
摘要：
Spark函数详解系列之RDD基本转换 https://www.cnblogs.com/MOBIN/p/5373256.html The RDD provides low level API for hight level of transformation (lasy loading) which 阅读全文