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Category: CCA-500 (v.1)

Exam CCA-500: Cloudera Certified Administrator for Apache Hadoop (CCAH) (update February 13th, 2016)

What is the maximum amount of virtual memory allocated for each map task before YARN will kill its Container?

Your cluster’s mapred-start.xml includes the following parameters
<name>mapreduce.map.memory.mb</name> <value>4096</value>
<name>mapreduce.reduce.memory.mb</name> <value>8192</value> And any cluster’s
yarn-site.xml includes the following parameters
<name>yarn.nodemanager.vmen-pmen-ration</name> <value>2.1</value> What is the
maximum amount of virtual memory allocated for each map task before YARN will kill its
Container?

What should you do?

Each node in your Hadoop cluster, running YARN, has 64GB memory and 24 cores. Your
yarn.site.xml has the following configuration: <property>
<name>yarn.nodemanager.resource.memory-mb</name> <value>32768</value>
</property> <property> <name>yarn.nodemanager.resource.cpu-vcores</name>
<value>12</value> </property> You want YARN to launch no more than 16 containers per
node. What should you do?


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