What is mapper in map reduce?
No Answer is Posted For this Question
Be the First to Post Answer
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
Explain what does the conf.setmapper class do?
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.
Explain JobConf in MapReduce.
How does MapReduce framework view its input internally?
Write a Mapreduce Program for Character Count ?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
How to get the single file as the output from MapReduce Job?
How do Hadoop MapReduce works?
What combiners are and when you should utilize a combiner in a map reduce job?
In Map Reduce why map write output to Local Disk instead of HDFS?
How to write a custom partitioner for a Hadoop MapReduce job?
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)