What Mapper does?
- 1 Answers
- 1072 Views
- I also Faced
- E-Mail Answers
Answer / Shweta Bhardwaj
In the MapReduce framework, the Mapper is a program that processes input data and generates intermediate key-value pairs. The mapper reads each input record, applies a user-defined function to it, and produces output records with a new key and value.
| Is This Answer Correct ? | 0 Yes | 0 No |
Name the examples of some companies that are using hadoop structure?
Does Hadoop requires RAID?
What exactly is hadoop?
What is Hadoop?
What is a namenode? How many instances of namenode run on a hadoop cluster?
What is IdentityMapper?
What is Rack awareness?
What is Apache Hadoop YARN?
What problems can be addressed by using Zookeeper?
What is structured data?
Mention what are the data components used by Hadoop?
What do the master class and the output class do?
-
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)
