Which two best describes how the FIFO Scheduler arbitrates the cluster resources for a job and its tasks?
You have cluster running with the FIFO Scheduler enabled. You submit a large job A to the
cluster, which you expect to run for one hour. Then, you submit job B to cluster, which you expect
to run a couple of minutes only.
You submit both jobs with the same priority.
Which two best describes how the FIFO Scheduler arbitrates the cluster resources for a job and its
tasks?
In a Hadoop cluster for running production jobs that require short turnaround times, the most important consid
In a Hadoop cluster for running production jobs that require short turnaround times, the most
important consideration for slave nodes is:
What can you tell the users?
Someone in your data center unplugs a slave node by accident. Users of the cluster notice via the
Hadoop Web UI that the cluster size has shrunken and express concerns about data loss and
HDFS performance. The replication factor of all the files in the cluster is unchanged from the
default of 3. What can you tell the users?
What is the Secondary NameNode?
What is the Secondary NameNode?
which the reduce method of a given Reducer can be called?
When is the earliest point at which the reduce method of a given Reducer can be called?
Which describes how a client reads a file from HDFS?
Which describes how a client reads a file from HDFS?
Which interface should your class implement?
You are developing a combiner that takes as input Text keys, IntWritable values, and emits Text
keys, IntWritable values. Which interface should your class implement?
Indentify the utility that allows you to create and run MapReduce jobs with any executable or script as the ma
Indentify the utility that allows you to create and run MapReduce jobs with any executable or script
as the mapper and/or the reducer?
How are keys and values presented and passed to the reducers during a standard sort and shuffle phase of MapRe
How are keys and values presented and passed to the reducers during a standard sort and shuffle
phase of MapReduce?
Assuming default settings, which best describes the order of data provided to a reducer’s reduce method:
Assuming default settings, which best describes the order of data provided to a reducer’s reduce
method: