hadoop小文件解决方案的相关内容

文章 2024-08-29 来自：开发者社区

Hadoop小文件解决方案

1.背景 HDFS并不擅长存储小文件，因为每个文件最少一个block，每个block的元数据都会在NameNode占用内存，如果存在大量的小文件，它们会吃掉NameNode节点的大量内存。如下所示，模拟小文件场景： ...

文章 2023-09-16 来自：开发者社区

1 MapReduce性能优化现在大家已经掌握了MapReduce程序的开发步骤，注意了，针对MapReduce的案例我们并没有讲太多，主要是因为在实际工作中真正需要我们去写MapReduce代码的场景已经是凤毛麟角了，因为后面我们会学习一个大数据框架Hive，Hive支持SQL，这个Hive底层会把SQL转化为MapReduce执行，不需要我们写一行代码，所以说工作中的大部分需求我们都使用S....

文章 2022-02-17 来自：开发者社区

[Hadoop]大量小文件问题及解决方案

1. HDFS上的小文件问题小文件是指文件大小明显小于HDFS上块（block）大小（默认64MB）的文件。如果存储小文件，必定会有大量这样的小文件，否则你也不会使用Hadoop（If you’re storing small files, then you probably have lots of them (otherwise you wouldn’t turn to Hadoop)）.....

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更新时间 2024-08-30 08:55:43

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