hdfs分析

使用DLA SQL(兼容Presto)CU版分析HDFS数据

可以在本地创建一个新的文本文件example.txt，在其中粘贴如下内容：7,8,9 然后执行如下命令将文件上传到HDFS（需要把172.16.199.0:9000替换成你的HDFS集群的host，下同）：hadoop fs-mkdir-p hdfs:/172.16.199.0:9000/test/p/d=1 hadoop fs...

hadoop之HDFS源码分析-HDFS通信协议

一、HDFS中提供两种通信协议1.Hadoop RPC接口：HDFS中基于Hadoop RPC框架实现的接口2.流式接口：HDFS中基于TCP或者HTTP实现的接口二、下面先讲Hadoop RPC接口Hadoop RPC调用使得HDFS进程能够像本地调用一样调用另一个进程中的方法，目前...

Hadoop2源码分析－HDFS核心模块分析

HDFS提供了一个可操作文件系统的抽象类org.apache.hadoop.fs.FileSystem，该类被划分在Hadoop-Common部分，其源码地址为：hadoop-2.6.0-src/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java，...

Hadoop2源码分析－HDFS核心模块分析

实时读取本地文件到 HDFS 案例分析|学习笔记

开发者学堂课程【数据采集系统 Flume：实时读取本地文件到 HDFS 案例分析】学习笔记，与课程紧密联系，让用户快速学习知识。课程地址：https://developer.aliyun.com/learning/course/99/detail/1631实时读取本地文件到 HDFS 案例分析1....

HDFS源码分析心跳汇报之DataNode注册

HDFS源码分析心跳汇报之DataNode注册，近期推出！

HDFS源码分析心跳汇报之周期性心跳

HDFS源码分析心跳汇报之周期性心跳，近期推出！

实时读取目录文件到 HDFS 案例分析|学习笔记

开发者学堂课程【数据采集系统 Flume 快速入门：实时读取目录文件到 HDFS 案例分析】学习笔记，与课程紧密联系，让用户快速学习知识。课程地址：https://developer.aliyun.com/learning/course/99/detail/1633实时读取目录文件到 HDFS 案例...

HDFS源码分析心跳汇报之整体结构

既然它是一个分布式文件系统，那么肯定存在很多物理节点，而这其中，就会有主从节点之分。在HDFS中，主节点是名字节点NameNode，它负责存储整个HDFS中文件元数据信息，保存了名字节点第一关系和名字节点第二关系。名字节点第一关系是文件与...

HDFS FileSystem 源码分析

创建 FileSystem 实例源码分析下面以FileSystem fs=FileSystem.get(new Configuration());为例进行源码剖析。进入get方法，源码如下：/*Returns the configured filesystem implementation.*@param conf the configuration to use*/public...

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