如何在Amazon EMR上重新启动HDFS

本文介绍了如何在Amazon EMR上重新启动HDFS的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我在Amazon EMR群集上对HDFS的设置进行了一些更改。我想重新启动namenode和datanode以使更改生效。我无法在namenode（master）和datanode上找到任何启​​动和停止脚本。

I have made some changes in the settings for HDFS on an Amazon EMR cluster. I want to restart the namenode and the datanode for the changes to take effect. I am not able to find any start and stop scripts to do so on neither the namenode(master) nor the datanodes. What should be the way to restart the cluster?

推荐答案

在EMR4上，在主控主机上运行 -

On EMR4 , run following on master host -

sudo /sbin/start hadoop-hdfs-namenode ssh -i <key.pem> <slave-hostname1> "sudo /sbin/restart hadoop-hdfs-datanode" ssh -i <key.pem> <slave-hostname2> "sudo /sbin/restart hadoop-hdfs-datanode" ssh -i <key.pem> <slave-hostname3> "sudo /sbin/restart hadoop-hdfs-datanode"