HDPCA

Note: This is post is part of the HDPCA exam objective series What is Rack Awareness To make sure that there is no single point of failure across the entire Hadoop infrastructure, and to ensure that the contention of resources is in a distributed manner, rack awareness plays an important role. Rack awareness is a […]

Note: This is post is part of the HDPCA exam objective series When you install the HDP cluster for the first time, you can specify the services that you want to configure in the ambari server. But you can always add or remove any service later on using the ambari server Web UI. In this […]

Note: This is post is part of the HDPCA exam objective series What is a NodeManager A NodeManager agent is deployed on each of the processing nodes in the cluster. It is the counterpart to the ResourceManager at the node level. It communicates with the ResourceManager to update the node state and receive any job […]

Note: This is post is part of the HDPCA exam objective series Sometimes we have to remove a cluster node from a live cluster for maintenance or if the node is dying or simply to reduce the size of the cluster. Decommissioning is a process that supports removing a component from the cluster. You must […]

Note: This is post is part of the HDPCA exam objective series We have seen in the last posts, how to install ambari-server and ambari-agent. Let us now see how we can install the HDP cluster using the ambari install wizard. We will be having the cluster topology as shown below. The ambari-server install wizard […]

Note: This is post is part of the HDPCA exam objective series The ambari agent communicates with the ambari server and provides all the necessary information required to the ambari-server. This post outlines the steps to install and configure the ambari agent. The ambari agents need to be installed in all the nodes in the […]

Note: This is post is part of the HDPCA exam objective series What is ambari-server and ambari-agent Ambari is an Apache project (http://ambari.apache.org), which in theory, provides an open source alternative to Cloudera Manager. It is the administration console for the Hortonworks distribution. At the time of writing Hortonworks employees are also the vast majority […]

Taking the Practice HDPCA practice exam on AWS Before taking the HDPCA exam, you can get the feel of the exam by using the HDPCA practice exam on AWS cloud. The practice exam is very similar to the actual exam. You can perform 6 tasks for practice on this machine. The recommended instance configuration in […]

Note: This is post is part of the HDPCA exam objective series To be able to install HDP in enterprise environments we have to configure the local repositories. There are 2 repositories that are required to get an enterprise Hadoop cluster up and running, namely: 1. Ambari Repositories 2. HDP Stack Repositories Configuring local repositories […]