Fix under replicated blocks in HDFS In this tutorial, let’s look into, How to Fix under replicated blocks in HDFS? How to check any under replicated, missing or corrupted blocks in the cluster? You can check all the blocks information from Namenode UI or with the help of fsck command. Namnode UI – http://<namenode-IP>:50070/dfshealth.html#tab-overview 2. Using…
In this article we will look into HBase Authorization, different access levels and its scopes. Here are the list of Access levels. For granting the permission for users and groups are defined here. You can grant permission on global, table, namespace column family or cell level. When you give permission on the group level, keep…
Hi, I have created a shell script to install hadoop 2.6.0 on ubuntu 14.04 LTS. By using this shell script you can install you can install hadoop and configure it in one go. This script will install and configure hadoop for single node cluster only. #!/bin/bash echo -n “Enter the new ‘GroupName’ for new Hadoop…
Apache Hadoop. Hadoop is a open source software framework for distributed storage and distributed processing on very large data sets. With the help of Hadoop, we can process large data sets on commodity hardware. In this tutorial we will look into Installing Hadoop 2.4 in Ubuntu 14.04 LTS (Single node cluster). Install Java Hadoop it…