开源大数据平台 E-MapReduce文件的相关内容

阿里云E-MapReduce我同时要写很多文件（上千），这样的话同步flush 性能会不会很差呀？

请问下阿里云E-MapReduce通过flume 的hdfs sink 写数据到oss桶。我同时要写很多文件（上千），这样的话同步flush 性能会不会很差呀？

阿里云E-MapReduce我用flume工具同步数据到oss，切分出来的文件毫无规律是什么原因？

阿里云E-MapReduce我用flume工具同步数据到oss，安装好了Hadoop环境，然后用jindodata，配置里的rollSize，rollInterval，rollCount设置不生效，切分出来的文件毫无规律是什么原因？

阿里云E-MapReduce我之前下载oss-hdfs上的文件。请问下，是我配置问题吗？

阿里云E-MapReduce我之前下载oss-hdfs上的文件。八月28号之前上传的文件都没法下载，八月29日以后的文件可以。报错信息只有这条请问下，是我配置问题吗？

MapReduce之小文件问题

小文件问题针对HDFS而言，每一个小文件在namenode中都会占用150字节的内存空间，最终会导致集群中虽然储了很多个文件，但是文件的体积并不大，这样就没有意义了。针对MapReduce而言，每一个小文件都是一个Block，都会产生一个InputSplit，最终每一个小文件都产生一个map任务&a...

Hadoop学习：MapReduce实现文件的解压缩

一、✌实现思想压缩> 获取输入流 > 获取压缩相关信息（反射） > 获取输出流 > 流的对拷 > 关闭资源解压缩> 校验文件是否可以解压 > 获取输入流 > 获取输出流 > 流的对拷 > 关闭资源二、✌代码实现1.✌compress压缩方法...

MapReduce中下列两种文件运行的结果是什么呢？

MapReduce中Hello World Bye World和Hello Hadoop Bye Hadoop文件运行的结果是什么呢？

MapReduce - 读取 ORC, RcFile 文件

一.引言MR 任务处理相关 hive 表数据时格式为 orc 和 rcFile，下面记录两种处理方法。编辑二.偷懒版读取 ORC, RcFile 文件最初不太熟悉 mr，只会 textFormat 一种输入模式，于是遇到 orc 和 rcFile 形式的 hive 数据需要在 mr 读取时，都是先通...

Hadoop中MapReduce 配置项的文件是什么呢？

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更新时间 2024-02-21 11:14:49

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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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立即开通

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优惠活动

StarRocks 免费试用

产品入门

快速入门指导

常见问题

最佳实践

EMR实时计算实践