hadoop hdfs网络的相关内容

Hadoop【基础知识 01+02】【分布式文件系统HDFS设计原理+特点+存储原理】（部分图片来源于网络）【分布式计算框架MapReduce核心概念+编程模型+combiner&partitioner+词频统计案例解析与进阶+作业的生命周期】（图片来源于网络）

Hadoop是一个大数据解决方案。它提供了一套分布式系统基础架构。核心内容包含 hdfs 和mapreduce。hadoop2.0 以后引入 yarn。hdfs 是提供数据存储的，mapreduce 是方便数据计算的。这篇主要说HDFS。 hdfs 对应 namenode 和 datanode...

Hadoop【基础知识 01】【分布式文件系统HDFS设计原理+特点+存储原理】（部分图片来源于网络）

企业级云上网络构建

10 课时 |

79 人已学 |

加入学习

专有云网络基础架构介绍

1 课时 |

472 人已学 |

加入学习

TCP/IP 网络基础

4 课时 |

1043 人已学 |

加入学习

Hadoop中HDFS的读写流程（面试重点）、为什么搜不到BlockPlacementPolicyDefault、网络拓扑-节点距离计算、机架感知（副本存储节点选择）

@[toc]8.HDFS的读写流程（面试重点）8.1HDFS写数据流程8.1.1剖析文件写入（1）客户端通过Distributed FileSystem模块向NameNode请求上传文件，NameNode检查目标文件是否已存在，父目录是否存在。（2）NameNode返回是否可以上传。（3）客户端请求...

共有3条

< 1 >

跳转至： GO

更新时间 2024-04-30 19:52:00

本页面内关键词为智能算法引擎基于机器学习所生成，如有任何问题，可在页面下方点击"联系我们"与我们沟通。

产品推荐

{"optioninfo":{"dynamic":"ture","static":"true"},"simplifiedDisplay":"newEdition","newCard":[{"ifIcon":"img","link":"https://img.alicdn.com/tfs/TB1XY8hGYr1gK0jSZFDXXb9yVXa-1740-328.png","icon":"","iconImg":"https://img.alicdn.com/tfs/TB1sxMI2rr1gK0jSZFDXXb9yVXa-200-200.png","contentLink":"https://www.aliyun.com/product/vpc","title":"专有网络 VPC","des":"专有网络 VPC 帮助您基于阿里云构建出一个隔离的网络环境，并可以自定义IP 地址范围、网段、路由表和网关等；此外，也可以通过专线/VPN/GRE等连接方式实现云上VPC与传统IDC的互联，构建混合云业务。","link1":"https://vpc.console.aliyun.com/?spm=5176.14468259.nav-right.91.21017341mrNdLP","btn1":"产品控制台","link2":"https://buy.aliyun.com/vpc?spm=5176.7937172.632920.btn1.181c5a86JFCwLN","btn2":"立即开通","btn3":"产品文档","link3":"https://help.aliyun.com/product/27706.html?spm=5176.7937172.632925.1.181c5a86JFCwLN","infoGroup":[{"infoName":"产品入门","infoContent":{"firstContentName":"产品快速入门","lastContentName":"常见问题","firstContentLink":"https://help.aliyun.com/document_detail/54095.html?spm=a2c4g.11174283.6.554.36fd6dd406apvV","lastContentLink":"https://help.aliyun.com/document_detail/185508.html?spm=a2c4g.11174283.6.954.36fd6dd406apvV"}},{"infoName":"精选推荐","infoContent":{"firstContentName":"私网连接申请公测","firstContentLink":"https://www.aliyun.com/product/network/privatelink?spm=5176.7937172.632920.btn2.181c5a86JFCwLN","lastContentLink":"","lastContentName":""}},{"infoName":"最佳实践","infoContent":{"firstContentLink":"https://help.aliyun.com/document_detail/57946.html?spm=a2c4g.11174283.6.693.36fd6dd406apvV","firstContentName":"混访混挂迁移示例","lastContentName":"ECS实例迁移","lastContentLink":"https://help.aliyun.com/document_detail/57954.html?spm=a2c4g.11174283.6.694.36fd6dd406apvV"}},{"infoName":"最新动态","infoContent":{"firstContentLink":"https://www.aliyun.com/product/news?spm=5176.7937172.1265182.211view.181c5a86JFCwLN&category=10&product=116","firstContentName":"产品最新动态","lastContentLink":"","lastContentName":""}}]}],"card":[],"search":[],"infoCard":[{"bannerUrl":"https://img.alicdn.com/tfs/TB1Xf81a3gP7K4jSZFqXXamhVXa-5169-974.jpg","bannerTitle":"mPaaS 小程序","bannerContent":"源自于支付宝小程序框架，亿级线上业务体量的锤炼，安全性媲美支付宝原生能力。<br>不仅面向自有 App 投放小程序，更可快速构建打包，覆盖支付宝、淘宝、钉钉等应用。","liveButtonName":"查看详情","liveButtonLink":"https://www.aliyun.com/product/mobilepaas/mpaas-miniprogram","contentTitle":"提供即开即用的端上体验","homePageLink":"https://common-buy.aliyun.com/?spm=5176.14673561.J_8751524360.2.56702709BussF3&commodityCode=mpaas_beta#/open","homePageName":"免费试用","linkGroup":[{"linkContent":"发布包大小极致优化，节省流量和存储。"},{"linkContent":"服务迭代不再受发版限制，快速发布，快速迭代。"},{"linkContent":"业务开发效率更加优秀，一次开发，多端运行。"}]}],"title":{"mainTitle":"mPaaS","subtitle":"源自于支付宝小程序框架，亿级线上业务体量的锤炼，安全性媲美支付宝原生能力。不仅面向自有 App 投放小程序，更可快速构建打包，覆盖支付宝、淘宝、钉钉等应用。","linkUrl":"https://www.aliyun.com/product/mobilepaas/mpaas-miniprogram","btnText":"查看详情"},"visual":{"topbg":"https://img.alicdn.com/tfs/TB1bQuBIYH1gK0jSZFwXXc7aXXa-3840-740.gif","icon":"","textColor":"dark"},"dataList":[{"summary":"啦啦啦","author":"wuwu","linksUrl":"#"}],"sceneCard":[],"txt":[]}

{"$env":{"JSON":{}},"$page":{"env":"production"},"$context":{"optioninfo":{"dynamic":"ture","static":"true"},"simplifiedDisplay":"newEdition","newCard":[{"ifIcon":"img","link":"https://img.alicdn.com/tfs/TB1XY8hGYr1gK0jSZFDXXb9yVXa-1740-328.png","icon":"","iconImg":"https://img.alicdn.com/tfs/TB1sxMI2rr1gK0jSZFDXXb9yVXa-200-200.png","contentLink":"https://www.aliyun.com/product/vpc","title":"专有网络 VPC","des":"专有网络 VPC 帮助您基于阿里云构建出一个隔离的网络环境，并可以自定义IP 地址范围、网段、路由表和网关等；此外，也可以通过专线/VPN/GRE等连接方式实现云上VPC与传统IDC的互联，构建混合云业务。","link1":"https://vpc.console.aliyun.com/?spm=5176.14468259.nav-right.91.21017341mrNdLP","btn1":"产品控制台","link2":"https://buy.aliyun.com/vpc?spm=5176.7937172.632920.btn1.181c5a86JFCwLN","btn2":"立即开通","btn3":"产品文档","link3":"https://help.aliyun.com/product/27706.html?spm=5176.7937172.632925.1.181c5a86JFCwLN","infoGroup":[{"infoName":"产品入门","infoContent":{"firstContentName":"产品快速入门","lastContentName":"常见问题","firstContentLink":"https://help.aliyun.com/document_detail/54095.html?spm=a2c4g.11174283.6.554.36fd6dd406apvV","lastContentLink":"https://help.aliyun.com/document_detail/185508.html?spm=a2c4g.11174283.6.954.36fd6dd406apvV"}},{"infoName":"精选推荐","infoContent":{"firstContentName":"私网连接申请公测","firstContentLink":"https://www.aliyun.com/product/network/privatelink?spm=5176.7937172.632920.btn2.181c5a86JFCwLN","lastContentLink":"","lastContentName":""}},{"infoName":"最佳实践","infoContent":{"firstContentLink":"https://help.aliyun.com/document_detail/57946.html?spm=a2c4g.11174283.6.693.36fd6dd406apvV","firstContentName":"混访混挂迁移示例","lastContentName":"ECS实例迁移","lastContentLink":"https://help.aliyun.com/document_detail/57954.html?spm=a2c4g.11174283.6.694.36fd6dd406apvV"}},{"infoName":"最新动态","infoContent":{"firstContentLink":"https://www.aliyun.com/product/news?spm=5176.7937172.1265182.211view.181c5a86JFCwLN&category=10&product=116","firstContentName":"产品最新动态","lastContentLink":"","lastContentName":""}}]}],"card":[],"search":[],"infoCard":[{"bannerUrl":"https://img.alicdn.com/tfs/TB1Xf81a3gP7K4jSZFqXXamhVXa-5169-974.jpg","bannerTitle":"mPaaS 小程序","bannerContent":"源自于支付宝小程序框架，亿级线上业务体量的锤炼，安全性媲美支付宝原生能力。<br>不仅面向自有 App 投放小程序，更可快速构建打包，覆盖支付宝、淘宝、钉钉等应用。","liveButtonName":"查看详情","liveButtonLink":"https://www.aliyun.com/product/mobilepaas/mpaas-miniprogram","contentTitle":"提供即开即用的端上体验","homePageLink":"https://common-buy.aliyun.com/?spm=5176.14673561.J_8751524360.2.56702709BussF3&commodityCode=mpaas_beta#/open","homePageName":"免费试用","linkGroup":[{"linkContent":"发布包大小极致优化，节省流量和存储。"},{"linkContent":"服务迭代不再受发版限制，快速发布，快速迭代。"},{"linkContent":"业务开发效率更加优秀，一次开发，多端运行。"}]}],"title":{"mainTitle":"mPaaS","subtitle":"源自于支付宝小程序框架，亿级线上业务体量的锤炼，安全性媲美支付宝原生能力。不仅面向自有 App 投放小程序，更可快速构建打包，覆盖支付宝、淘宝、钉钉等应用。","linkUrl":"https://www.aliyun.com/product/mobilepaas/mpaas-miniprogram","btnText":"查看详情"},"visual":{"topbg":"https://img.alicdn.com/tfs/TB1bQuBIYH1gK0jSZFwXXc7aXXa-3840-740.gif","icon":"","textColor":"dark"},"dataList":[{"summary":"啦啦啦","author":"wuwu","linksUrl":"#"}],"sceneCard":[],"txt":[]}}