What happens when a datanode fails ?
No Answer is Posted For this Question
Be the First to Post Answer
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
How to overwrite an existing output file during execution of mapreduce jobs?
What is a Speculative Execution in Hadoop MapReduce?
Is it important for Hadoop MapReduce jobs to be written in Java?
What is a mapreduce algorithm?
Define the Use of MapReduce?
what are the most common input formats defined in Hadoop?
Is it possible to search for files using wildcards?
What is a "map" in Hadoop?
How to optimize Hadoop MapReduce Job?
What are the identity mapper and reducer in MapReduce?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
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)