Can you explain how do ‘map’ and ‘reduce’ work?
No Answer is Posted For this Question
Be the First to Post Answer
What is IdentityMapper?
What is the jobtracker?
What is difference between split and block in hadoop?
What are the limitations of importing RDBMS tables into Hcatalog directly?
What is a Task instance in Hadoop? Where does it run?1
Where is the Mapper Output intermediate kay-value data stored ?
Define a daemon?
Does hadoop always require digital data to process?
What is a Combiner?
How to change Replication Factor For below cases ?
How to change from su to cloudera?
How does NameNode tackle DataNode failures?
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)