Map Reduce Programming – Concise Definition

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college essays on autism Above is a visual representation of map – reduce framework.

school paper writing services Map-reduce is a programming technique to solve any aggregation-grouping-summation related problem, where we have huge amount of data and try to do the above operation in parallel in no of distributed machines.

click here In map function/s, we will collect the frequency of data after processing on some subset of data.

source In reduce function/s, we will merge and aggregate the intermediate processed data from map function/s and can apply any other statistical formula on the result to make final output. acknowledgement sample for dissertation So the final result from map-reduce is a form of summery of raw data in repository before processing the data with map-reduce framework.

order of scientific research paper We should understand the scenarios where the map-reduce operation can/can not be applied.

laughter the best medicine essay 1> Map-Reduce is a batch operation, so it should not be applied to any on-line scenarios. phd paper writing 2> Map-reduce can not be applied to recursive problems, because in recursion upper cycle is dependent on inner cycle of the problem which is not the case for map-reduce 3> If the data size is low i.e. it can be processed in single machine, we should apply it. Here map-reduce programming within cluster will be an over-engineering.

link 4> We can use map-reduce in frequecy calculation on unique obejects and apply any sort of aggregation function on that frequecy to form a new dimension of the information.

go here Reader should comment for the scenarios where map-reduce should be/not to be applied.

We will describe some map-reduce scenario in our next articles.

An interesting reference to understand map-reduce framework –

home page How I explained MapReduce to my Wife?

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