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开发者学堂课程【Flume 基础应用实战-企业全场景解决方案：Apache Flume- 案例-监控采集文件夹变化（sqoopdir、HDFS）】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/cour...

Hadoop 分布式文件系统 HDFS

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监控目录中文件上传HDFS中

代码实例 package oa.epoint.com.watchFile; import java.util.Date; import java.util.Timer; import java.util.TimerTask; /** * Title: 文件监控之定时器 */ public class...

监控hdfs坏块脚本

最近发生了一次因为hdfs的坏块导致的hive计算问题，因此写了个监控脚本用来监控hdfs的坏块，脚本如下： 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35...

《Hadoop MapReduce实战手册》一1.6 使用HDFS监控UI

本节书摘来异步社区《Hadoop MapReduce实战手册》一书中的第1章，第1.6节，作者：【美】Srinath Perera , Thilina Gunarathne 译者：杨卓荦责编：杨海玲，更多章节内容可以访问云栖社区“异步社区”公众号查看。 1.6 使用HDFS监控UI Hado...

HDFS源码分析数据块复制监控线程ReplicationMonitor（二）

HDFS源码分析数据块复制监控线程ReplicationMonitor（一）

ReplicationMonitor是HDFS中关于数据块复制的监控线程，它的主要作用就是计算DataNode工作，并将复制请求超时的块重新加入到待调度队列。其定义及作为线程核心的run()方法如下： /** * Periodical...

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