{"id":591,"date":"2019-03-01T11:04:25","date_gmt":"2019-03-01T11:04:25","guid":{"rendered":"https:\/\/prwatech.in\/blog\/?p=591"},"modified":"2020-07-10T05:19:28","modified_gmt":"2020-07-10T05:19:28","slug":"hadoop-cluster-upgrade","status":"publish","type":"post","link":"https:\/\/prwatech.in\/blog\/hadoop\/hadoop-cluster-upgrade\/","title":{"rendered":"Hadoop-Cluster Upgrade"},"content":{"rendered":"

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How to upgrade Hadoop 1.2.0 to Hadoop 2.6.0 in few steps?<\/h1>\n

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Upgrade Hadoop 1.2.0 to Hadoop 2.6.0,<\/strong>\u00a0In This tutorial, one can easily know the information about How to upgrade Hadoop 1.2.0 to Hadoop 2.6.0 which are available and are used by most of the Hadoop developers and self-learners. Are you dreaming to become to certified Pro Hadoop Developer<\/a>, then stop just dreaming, get your Hadoop certification course from India\u2019s Leading Hadoop Training institute in Bangalore<\/a>.<\/p>\n

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This Hadoop cluster upgrade may be required when you upgrade from the older version of the Hadoop cluster to a newer version. Do you want to upgrade Hadoop 1 to 2, So follow the below mentioned Hadoop cluster upgrade steps from Prwatech<\/a> and learn Hadoop course<\/a> like a pro from today itself under 15+ Years of Hands-on Experienced Professionals.<\/p>\n

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Hadoop cluster upgrade steps :<\/strong><\/h2>\n

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\u2666 Step 1:<\/span> You must have a 1.2.0 running cluster.<\/strong><\/p>\n

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\"hadoop<\/strong><\/p>\n

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\u2666 Step 2:<\/span> Upgrade java8<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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\u2666 Step 3<\/span>: Check any upgrade is going on or not.<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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\u2666 Step 4<\/span>: Make backup for all data, file of HDFS. using the below command.<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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\u2666 Step 5<\/span>:- Close your Cluster<\/strong><\/p>\n

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\"Hadoop<\/strong>
\n\u2666 Step 6<\/span>:- Download Hadoop 2.6.0 and untar that<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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\u2666 Step 7<\/span>:- Set .bashrc for new Hadoop<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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\u2666 Step 8<\/span>:- Check Hadoop version<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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\u2666 Step 9<\/span>:- Set all the configuration files.<\/strong><\/p>\n

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core-site.xml<\/strong>
\nhdfs-site.xml<\/strong>
\nmapred-site.xml<\/strong>
\nyarn-site.xml<\/strong>
\nHadoop-env.sh<\/strong><\/p>\n

(Refer Hadoop-Singlenode 2.x blog)<\/strong><\/p>\n

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\u2666 Step 10<\/span>:- Now upgrade your name node<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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\u2666 Step 11<\/span>:- Check NameNode started or not<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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\u2666 Step 12<\/span>:- Start DataNode<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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\u2666 Step 13<\/span>:- Now finalize your upgrade<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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\u2666 Step 14<\/span>:- Start other daemons<\/strong><\/p>\n

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\"Hadoop<\/strong><\/p>\n

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Become a certified expert in Hadoop technology<\/a> by getting enrolled from Prwatech<\/a> E-learning India’s leading advanced Hadoop training institute.<\/a> Register Now for more updates on Hadoop upgrades. Our expert trainers will help you towards mastering real-world skills in relation to these Hadoop technologies.<\/p>\n

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