Concise、Speed、Lazy Evaluation、In-memory processing均属于Spark的特点

William Shakespeare, English poet, dramatist and actor, is often called the English national poet and considered by many greatest dramatists of all time.

This boy is quite intelligent ____ lazy in his study()

Hadoop擅长批处理，不适合流计算

在Spark运行时，Task Scheduler为程序构建基本运行环境 Spark context对象（应用管家），向资源管理器进行资源申请，任务分配与监控

Spark是一个专为大规模数据处理而设计的快速通用的计算引擎，官方支持Scala、Java、C、Python语言

RDD的两种主要操作类型是Partition和Action