SPARK

  

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 is basis of Stream API

1.source input -----> channel -----> source ouput

2.Name node ---> data node or service node

3.Master / Slave, heartbeat

4. Zookeeper as coordinator

5.Configuration, Context, Resource, Exectutor, Task, Stream(input, output)

6.