Which process instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v2 (MRv
Which process instantiates user code, and executes map and reduce tasks on a cluster running
MapReduce v2 (MRv2) on YARN?
What occurs when you execute the command: hdfs haadmin –failover nn01 nn02
Your cluster implements HDFS High Availability (HA). Your two NameNodes are named nn01 and
nn02. What occurs when you execute the command: hdfs haadmin –failover nn01 nn02
Can you configure a worker node to run a NodeManager daemon but not a DataNode daemon and still have a functio
Your Hadoop cluster is configured with HDFS and MapReduce version 2 (MRv2) on YARN. Can
you configure a worker node to run a NodeManager daemon but not a DataNode daemon and still
have a function cluster?
What does the this tell you?
Cluster Summary:
45 files and directories, 12 blocks = 57 total. Heap size is 15.31 MB/193.38MB(7%)
Refer to the above screenshot.
You configure a Hadoop cluster with seven DataNodes and on of your monitoring UIs displays the
details shown in the exhibit.
What does the this tell you?
Which YARN process runs as “controller O” of a submitted job and is responsible for resource requests?
Which YARN process runs as “controller O” of a submitted job and is responsible for resource
requests?
Which two features does Kerberos security add to a Hadoop cluster?
Which two features does Kerberos security add to a Hadoop cluster?
How will the Fair Scheduler handle these two jobs?
You have a cluster running with the Fair Scheduler enabled. There are currently no jobs running
on the cluster, and you submit a job A, so that only job A is running on the cluster. A while later,
you submit Job B. now job A and Job B are running on the cluster at the same time. How will the
Fair Scheduler handle these two jobs?
you need to do when adding a new slave node to cluster?
Assuming a cluster running HDFS, MapReduce version 2 (MRv2) on YARN with all settings at
their default, what do you need to do when adding a new slave node to cluster?
How would you tune your io.sort.mb value to achieve maximum memory to disk I/O ratio?
You observe that the number of spilled records from Map tasks far exceeds the number of map
output records. Your child heap size is 1GB and your io.sort.mb value is set to 100 MB. How
would you tune your io.sort.mb value to achieve maximum memory to disk I/O ratio?
Which YARN daemon or service negotiations map and reduce Containers from the Scheduler, tracking their status
Which YARN daemon or service negotiations map and reduce Containers from the Scheduler,
tracking their status and monitoring progress?