Which daemons need to be installed on your clusters master nodes?
You are configuring your cluster to run HDFS and MapReduce v2 (MRv2) on YARN. Which
daemons need to be installed on your clusters master nodes?
What happens when you issue that third command?
Assume you have a file named foo.txt in your local directory. You issue the following three
commands: Hadoop fs –mkdir input Hadoop fs –put foo.txt input/foo.txt Hadoop fs –put
foo.txt input What happens when you issue that third command?
you need to do in order to run on the cluster and submit jobs from the command line of the gateway machine?
You have a Hadoop cluster running HDFS, and a gateway machine external to the cluster
from which clients submit jobs. What do you need to do in order to run on the cluster and
submit jobs from the command line of the gateway machine?
Which method should you tell that developer to implement?
You have converted your Hadoop cluster from a MapReduce 1 (MRv1) architecture to
aMapReduce 2 (MRv2) on YARN architecture. Your developers are accustomed to
specifying map and reduce tasks (resource allocation) tasks when they run jobs. A
developer wants to know how specify to reduce tasks when a specific job runs. Which
method should you tell that developer to implement?
What should you do?
You are upgrading a Hadoop cluster from HDFS and MapReduce version 1 (MRv1) to one
running HDFS and MapReduce version 2 (MRv2) on YARN. You want to set and enforce a
block of 128MB for all new files written to the cluster after the upgrade. What should you
do?
Which two are Features of Hadoop’s rack topology?
Which two are Features of Hadoop’s rack topology?
Which YARN daemon or service negotiates map and reduce Containers from the Scheduler, tracking their status an
Which YARN daemon or service negotiates map and reduce Containers from the
Scheduler, tracking their status and monitoring for progress?
How must you format the underlying filesystem of each DataNode?
You are configuring a cluster running HDFS, MapReduce version 2 (MRv2) on YARN
running Linux. How must you format the underlying filesystem of each DataNode?
Which describes the file read process when a client application connects into the cluster and requests a 50MB
Your cluster has the following characteristics: • A rack aware topology is configured and on •
Replication is not set to 3 • Cluster block size is set to 64 MB Which describes the file read
process when a client application connects into the cluster and requests a 50MB file?
what would another use see when they look in the directory?
On a cluster running CDH 5.0 or above, you use the hadoop fs –put command to write a
300MB file into a previously empty directory using an HDFS block of 64MB. Just after this
command has finished writing 200MB of this file, what would another use see when they
look in the directory?