如何在Amazon EMR上重新启动HDFS [英] How to restart HDFS on Amazon EMR

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"

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