What are combiners? When should I use a combiner in my MapReduce Job?
No Answer is Posted For this Question
Be the First to Post Answer
When is the reducers are started in a MapReduce job?
Why do we need MapReduce during Pig programming?
Mention what is the hadoop mapreduce apis contract for a key and value class?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
How to write a custom partitioner for a Hadoop MapReduce job?
How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?
What do sorting and shuffling do?
What is heartbeat in hdfs? Explain.
what are the most common input formats defined in Hadoop?
Define the purpose of the partition function in mapreduce framework
What is the Job interface in MapReduce framework?
How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?
Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)
Apache Spark (991)
Apache HBase (164)
Apache Flume (95)
Apache Impala (72)
Apache Cassandra (392)
Apache Mahout (35)
Apache Sqoop (82)
Apache ZooKeeper (65)
Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)
Apache Avro (26)
Apache Presto (15)
Apache Tajo (26)
Hadoop General (407)