You are migrating a cluster from MapReduce version 1 (MRv1) to MapReduce version2 (MRv2) on YARN. To want to maintain your MRv1 TaskTracker slot capacities when you migrate. What should you do? A. Configure yarn.applicationmaster.resource.memory-mb and yarn.applicationmaster.cpu-vcores so that ApplicationMaster…
Which process instantiates user code, and executes map and reduce tasks on a cluster running MapReduce V2 (MRv2) on YARN? A. NodeManager B. ApplicationMaster C. ResourceManager D. TaskTracker E. JobTracker F. DataNode G. NameNode
In CDH4 and later, which file contains a serialized form of all the directory and files inodes in the filesystem, giving the NameNode a persistent checkpoint of the filesystem metadata? A. fstime B. VERSION C. Fsimage_N (Where N reflects all…
A user comes to you, complaining that when she attempts to submit a Hadoop job, it fails. There is a directory in HDFS named /data/input. The Jar is named j.jar, and the driver class is named DriverClass. She runs command:…
Your cluster is running MapReduce vserion 2 (MRv2) on YARN. Your ResourceManager is configured to use the FairScheduler. Now you want to configure your scheduler such that a new user on the cluster can submit jobs into their own queue…
A slave node in your cluster has four 2TB hard drives installed (4 x 2TB). The DataNode is configured to store HDFS blocks on the disks. You set the value of the dfs.datanode.du.reserved parameter to 100GB. How does this alter…
Identify two features/issues that YARN is designed to address: A. Standardize on a single MapReduce API B. Single point of failure in the NameNode C. Reduce complexity of the MapReduce APIs D. Resource pressures on the JobTracker E. Ability to…
What processes must you do if you are running a Hadoop cluster with a single NameNode and six DataNodes, and you want to change a configuration parameter so that it affects all six DataNodes. A. You must modify the configuration…
You are working on a project where you need to chain together MapReduce, Pig jobs. You also needs the ability to use forks, decision, and path joins. Which ecosystem project should you use to perform these actions? A. Oozie B.…
Your Hadoop cluster contains nodes in three racks. You have NOT configured the dfs.hosts property in the NameNode’s configuration file. What results? A. No new nodes can be added to the cluster until you specify them in the dfs.hosts file…