ccah-500 第13题Which three basic configuration parameters must you set to migrate

13.Which three basic configuration parameters must you set to migrate your cluster from MapReduce 1 (MRv1) to MapReduce V2 (MRv2)?(Choose three)

A. Configure the NodeManager to enable MapReduce services on YARN by setting the following property in yarn-site.xml:

<name>yarn.nodemanager.aux-services</name>

<value>mapreduce_shuffle</value>

B. Configure the NodeManager hostname and enable node services on YARN by setting the following property in yarn-site.xml:

<name>yarn.nodemanager.hostname</name>

<value>your_nodeManager_hostname</value>

C. Configure a default scheduler to run on YARN by setting the following property in mapred-site.xml:

<name>mapreduce.jobtracker.taskScheduler</name>

<Value>org.apache.hadoop.mapred.JobQueueTaskScheduler</value>

D. Configure the number of map tasks per jon YARN by setting the following property in mapred:

<name>mapreduce.job.maps</name>

<value>2</value>

E. Configure the ResourceManager hostname and enable node services on YARN by setting the following property in yarn-site.xml:

<name>yarn.resourcemanager.hostname</name>

<value>your_resourceManager_hostname</value>

F. Configure MapReduce as a Framework running on YARN by setting the following

property in mapred-site.xml:

<name>mapreduce.framework.name</name>

<value>yarn</value>

Answer: A,E,F

 

reference：

修正选项A

 

http://www.aiotestking.com/cloudera/which-three-basic-configuration-parameters-must-you-set-to-migrate-your-cluster-from-mapreduce-1-mrv1-to-mapreduce-v2-mrv2/

 

 

A minimal configuration required to run MRv2 jobs on YARN is:
yarn-site.xml configuration

yarn.resourcemanager.hostname
you.hostname.com

yarn.nodemanager.aux-services
mapreduce_shuffle

mapred-site.xml configuration

mapreduce.framework.name
yarn

 

oreily：