June 2019
Beginner to intermediate
360 pages
10h 55m
English
Content preview from Big Data Simplified
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Introducing MapReduce | 85
the nodes in which the map phase has occurred across to the node where the reduce phase
occurs. So, there is less data transfer to the reducer node.
However, we must ensure that the use of combiners does not impact the nal result. The nal
result from MapReduce should remain the same whether or not a combiner is used.
4.5 WHAT IS YARN?
YARN or Yet Another Resource Negotiator was introduced as a Hadoop component in 2013.
When Hadoop 2.0 was released, there was a fundamental change introduced in the architecture.
The MapReduce framework was now divided into two components, such as MapReduce and
YARN. While MapReduce ...
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