mapreduce模式-阿里云

[帮助文档] 存算分离模式下借助本地缓存提升查询性能

EMR Serverless StarRocks 3.1.0版本正式支持存算分离模式。在该模式下计算和存储资源被解耦，极大地优化了资源利用效率和成本。为了进一步提升查询性能，该模式充分利用本地缓存技术，将热数据存储于计算节点的本地磁盘中。当查询请求命中本地缓存时，存算分离集群的查询性能与存算一体集群...

【集群模式】执行MapReduce程序-wordcount

因为是在hadoop集群下通过jar包的方式运行我们自己写的wordcount案例，所以需要传递的是 HDFS中的文件路径，所以我们需要修改上一节【本地模式】中 WordCountRunner类的代码：//5.设置统计文件输入的路径,将命令行的第一个参数作为输入文件的路径 FileInputFor...

Hadoop 分布式计算框架 MapReduce

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【本地模式】第一个Mapreduce程序-wordcount

【本地模式】：也就是在windows环境下通过hadoop-client相关jar包进行开发的，我们只需要通过本地自己写好MapReduce程序即可在本地运行。一个Maprduce程序主要包括三部分：Mapper类、Reducer类、执行类。map阶段：将每一行单词提取出来转为map(key,1)的...

23 MAPREDUCE程序运行模式

本地运行模式1）mapreduce程序是被提交给LocalJobRunner在本地以单进程的形式运行2）而处理的数据及输出结果可以在本地文件系统，也可以在hdfs上3）怎样实现本地运行？写一个程序，不要带集群的配置文件（本质是你的mr程序的conf中是否有mapreduce.framework.na...

阿里云E-MapReduce在初始化 FileSystem 过程中有啥参数可以设置开启缓存模式？

【本地模式】第一个Mapreduce程序-wordcount

[帮助文档] 访问ClickHouse集群的方式有哪些

访问E-MapReduce（简称EMR）上的ClickHouse集群支持通过原生JDBC访问和通过负载均衡SLB访问两种方式。本文为您介绍如何通过这两种方式访问ClickHouse集群。

E-MapReduce block模式如何向JindoFS上传写入文件

[帮助文档] 如何使用JindoFS的缓存模式

缓存模式（Cache）主要兼容原生OSS存储方式，文件以对象的形式存储在OSS上，每个文件根据实际访问情况会在本地进行缓存，提升EMR集群内访问OSS的效率，同时兼容了原有OSS原有文件形式，数据访问上能够与其他OSS客户端完全兼容。本文主要介绍JindoFS的缓存模式及其使用方式。

[帮助文档] JindoFS的namespace的存储模式支持哪些权限

本文介绍JindoFS的namespace的存储模式（Block或Cache）支持的文件系统权限功能。Block模式和Cache模式不支持切换。

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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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StarRocks 免费试用

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常见问题

最佳实践

EMR实时计算实践