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Mention what is the next step after mapper or maptask?
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Mention what is the next step after mapper or maptask?
What is Data Locality in Hadoop?
How hadoop mapreduce works?
what job does the conf class do?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
What is KeyValueTextInputFormat in Hadoop MapReduce?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
What is the best way to copy files between HDFS clusters?
How can we assure that the values regarding a particular key goes to the same reducer?
What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
How many Mappers run for a MapReduce job?
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Apache Hadoop (394) - MapReduce (354)
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- 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)
