After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?
473Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?
456Post New Hadoop General Questions
What is Identity reducer?
What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?
What is fsck?
Name the most common input formats defined in hadoop?
Explain Data Locality in Hadoop?
What is the use of context object?
How to debug Hadoop code?
How jobtracker assign tasks to the tasktracker?
For using hadoop list the network requirements?
How is the splitting of file invoked in Hadoop framework?
What is meant by streaming access?
How ordering in hdfs is finished?
What is Mapper? How can we compress Mapper output in Hadoop?
What is a combiner in hadoop?
What is Slot in Hadoop v1? Why was it removed from Hadoop v2?