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Why aggregation cannot be done in Hadoop Mapper? (98 views) 3 Anirudh 4 hours
Is it mandatory to set input and output type/format in MapReduce? (101 views) 2 Anirudh 8 hours
Hadoop (4 views) 1 Manjunath K 9 hours
Usage: (6 views) 1 soodmohit 2 days
Hadoop block size in production (273 views) 4 janardanajish 2 days
Explain Reduce-side joins? (56 views) 2 Anirudh 3 days
Which part of metadata is stored on Namenode’s disk persistently in Hadoop? (118 views) 3 sshriananda 3 days
When its not recommended to use MR paradigm for large scale data-processing? (30 views) 2 Anirudh 4 days
How to sort intermediate output based on values in MapReduce? (110 views) 3 janardanajish 4 days
In which kind of scenarios MapReduce jobs will be more useful than PIG? (170 views) 3 sharmavarun 5 days
Why Hadoop MapReduce? (121 views) 3 sharmavarun 5 days
What happens when multiple clients try to write in same HDFS file at same time? (86 views) 3 sharmavarun 5 days
Differentiate Secondary NameNode and Checkpoint Node in Hadoop (151 views) 4 sharmavarun 5 days
What is the difference between HDFS and NAS? (88 views) 3 sharmavarun 5 days
What is Safemode? how to come out of Safemode in Hadoop? (90 views) 3 kumaripoonam 5 days
Explain Hadoop Archives? (172 views) 3 kumaripoonam 5 days
Heartbeat for Hadoop (2101 views) 5 palyash 6 days
How often datanode send heartbeat to namenode (394 views) 3 palyash 6 days
What is Secondary NameNode in Hadoop? (333 views) 5 palyash 6 days
Output of Mapper or Partitioner written on local disk? (321 views) 5 palyash 6 days
How many times combiner is called on a mapper node? (512 views) 5 palyash 6 days
what is Hadoop? (248 views) 4 janardanajish 1 week
Difference between RDBMS with Hadoop MapReduce (59 views) 2 Anirudh 1 week
How to write a custom partitioner for a Hadoop MapReduce job? (72 views) 3 Anirudh 1 week
Suppose Hadoop spawned 100 tasks for a job & 1 task failed. what will Hadoop do? (99 views) 4 Venuvanshi 1 week
Is YARN a replacement of Hadoop MapReduce? (126 views) 4 Venuvanshi 1 week
Can we recover a hadoop cluster where all data nodes are down (26 views) 1 nayaksabyasachi 1 week
What is Balancer in Apache Hadoop? (133 views) 5 nayaksabyasachi 1 week
What is KeyValueTextInputFormat in Hadoop? (101 views) 3 Chaitanya 1 week
What happen if number of reducer is 0 in Hadoop? (154 views) 3 Chaitanya 1 week