The YARN ResourceManager is responsible for tracking the resources in a cluster and scheduling applications. Before CDH 5, the ResourceManager was a single point of failure in a YARN cluster. If Resource manager is down, then none of the jobs will run in the cluster. The ResourceManager high availability (HA) feature adds redundancy in the […]
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Configure NameNode HA
Prior to Hadoop 2.0.0, the NameNode was a single point of failure (SPOF) in an HDFS cluster. Each cluster had a single NameNode, and if that machine or process became unavailable, the cluster as a whole would be unavailable until the NameNode was either restarted or brought up on a secondary namenode. The secondary namenode […]
Continue ReadingCCA131 – Cloudera Administration Certification Exam Notes and Preparation Guide
In this post, we’ll go through the exam blueprint topics and show you what and how to perform the tasks in each topic. All the embedded links are my exam preparation notes. Go through each link and perform/practice it in your cluster. Please practice till the time you’re confident of doing all the tasks without referring […]
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