hadoop源码学习的相关内容

文章 2017-07-03 来自：开发者社区

Hadoop源码学习之HDFS（一）

　　Hadoop的HDFS可以分为NameNode与DataNode,NameNode存储所有DataNode中数据的元数据信息。而DataNode负责存储真正的数据（数据块）信息以及数据块的ID。　　NameNode上并不永久保存哪个DataNode上有哪些数据块的信息，而是通过DataNode启动时的上报，来更新NameNode上的映射表。　　那么从DataNode上开始一点一点看：　....

文章 2014-01-25 来自：开发者社区

Hadoop源码学习

这一系列文章，算是自己的读书笔记。 ------------------------------------------------- ## 我是如何阅读源码 - 1. 推荐大家看董西成的Hadoop技术内幕，我写的笔记大部分摘抄总结自这本书。 - 2. 自己阅读源码、基于hadoop1.0.3的源码 - 3. 网上其他网友的总结、博客 ## 关于本博客由于CSDN不支持markdown，所.....

文章 2014-01-25 来自：开发者社区

Hadoop源码学习：RPC

Hadoop源码学习：RPC Hadoop RPC使用java NIO编写，达到高性能，轻量级，可控性。主要分为四层：序列化层，函数调用层，网络传输层，服务器端处理框架序列化层：实现Writable接口函数调用层：java反射机制和动态代理实现函数调用网络传输层：使用Socket机制服务器端处理框架：基于Reactor设计模式的事件驱动I/O模型如何使用Hadoop RPC： ...

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开源大数据平台 E-MapReduce

开源大数据平台 E-MapReduce（简称“EMR”）是云原生开源大数据平台，向客户提供简单易集成的Hadoop、Hive、Spark、Flink、Presto、ClickHouse、StarRocks、Delta、Hudi等开源大数据计算和存储引擎服务。

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