Question-12: You are working on a Replication of HDFS files from source CDP

Question-12:  You are working on a Replication of HDFS files from source CDP Cluster to Destination CDP cluster. However, there are thousands of files and subdirectories. You need to increase the memory, how would you do?

1. You need to increase the heap size in hadoop-env.sh file.
2. To increase the heap size, add the key-value pair HADOOP_CLIENT_OPTS=-Xmx<memory_value>
3. To increase the heap size, add the key-value pair MAPRED_DISTCP_OPTS="-Xmx<memory_value>
4. To increase the heap size, add the key-value pair HADOOP_USER_PARAMS=-Xmx<memory_value>

Answer: 1,2

Steps

• On the destination Cloudera Manager instance, go to the HDFS service page.
• Click the Configuration tab.
• Expand SCOPE and select HDFS service name (Service-Wide) option.
• Expand CATEGORY and select Advanced option.
• Locate the HDFS Replication Environment Advanced Configuration Snippet (Safety Valve) for hadoop-env.sh property.
• To increase the heap size, add the key-value pair HADOOP_CLIENT_OPTS=-Xmx<memory_value>. For example, if you enter HADOOP_CLIENT_OPTS=-Xmx1g, the heap size is set to 1 GB. This value should be adjusted depending on the number of files and directories being replicated.
• Enter a Reason for change, and then click Save Changes to commit the changes.
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  This Question is from QuickTechie Cloudera CDP Certification Preparation Kit.