AWS Four node cluster on Hadoop

+1 vote

 To deploy a 4 node cluster of Hadoop in AWS which instance type can be used?

May 31, 2018 in Cloud Computing by DragonLord999
• 8,450 points
891 views

2 answers to this question.

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First let’s understand what actually happens in a Hadoop cluster, the Hadoop cluster follows a master slave concept. The master machine processes all the data, slave machines store the data and act as data nodes. Since all the storage happens at the slave, a higher capacity hard disk would be recommended and since master does all the processing, a higher RAM and a much better CPU is required. Therefore, you can select the configuration of your machine depending on your workload. For e.g. – In this case c4.8xlarge will be preferred for master machine whereas for slave machine we can select i2.large instance. If you don’t want to deal with configuring your instance and installing hadoop cluster manually, you can straight away launch an Amazon EMR (Elastic Map Reduce) instance which automatically configures the servers for you. You dump your data to be processed in S3, EMR picks it from there, processes it, and dumps it back into S3.

answered May 31, 2018 by Meci Matt
• 9,460 points
0 votes

Follow the following step one by one and you are good to go:-

Install Java And Hadoop

$ sudo apt-get update && sudo apt-get dist-upgrade

Install OpenJDK

  • Installing latest java
$ sudo apt-get install openjdk-8-jdk

Installing Hadoop

  • Download Hadoop from one of these mirrors. Select appropriate version number. Below command will download gzip file and copies it to Downloads directory, which is created using -P paramter.
$ wget http://apache.mirrors.tds.net/hadoop/common/hadoop-2.8.1/hadoop-2.8.1.tar.gz -P ~/Downloads
  • We will now try to extract it to /usr/local.
$ sudo tar zxvf ~/Downloads/hadoop-* -C /usr/local
  • Renaming the hadoop-* to hadoop under /usr/local directory.
$ sudo mv /usr/local/hadoop-* /usr/local/hadoop

Setting up Environmental Variables

  • To know where the java is installed (where the java executable is), execute the below command. Path may be different for you.

image

  • Open .bashrc file in your home directory with your favorite editor. Include the below lines .
$ vi ~/.bashrc

For Java:

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export PATH=$PATH:$JAVA_HOME/bin

For Hadoop:

export HADOOP_HOME=/usr/local/hadoop
export PATH=$PATH:$HADOOP_HOME/bin

For Hadoop Configuration directory:

export HADOOP_CONF_DIF=/usr/local/hadoop/etc/hadoop


for further steps follow:-

https://medium.com/@jeevananandanne/setup-4-node-hadoop-cluster-on-aws-ec2-instances-1c1eeb4453bd

    answered Aug 21, 2018 by Priyaj
    • 58,100 points

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