Hadoop基础-MapReduce的常用文件格式介绍
作者：尹正杰
版权声明：原创作品，谢绝转载！否则将追究法律责任。
一.MR文件格式-SequenceFile
1>.生成SequenceFile文件（SequenceFileOutputFormat）
The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage. Rather than rely on hardware to deliver high-availability, the library itself is designed to detect and handle failures at the application layer, so delivering a highly-available service on top of a cluster of computers, each of which may be prone to failures.