jagatsingh This question should be clarified a bit to say how many workers are there. Otherwise both true and false can be correct. If there are less workers then maps which are running at given moment will be less. Otherwise if more or equal workers are available then all can run.
george_jost In an ideal implementation for your size M, it should be true but obviously it isn't always true and is therefore false. We don't have an infinite number of processors.
m_prymek The question is wrong IMHO. Number of workers is totally independent on number of data partitions. You can have mn.
The question should be "the number of workers is typically...", "you can have M workers", "you must have at least M workers", "you can't have more than M workers", "if you have M workers, you get better performance than M/2 workers" or something like that...
george_jost True but on a logical perspective, the maximum number of physical workers on your problem is going to be M. I presume, one's operating system would hide this, no?
fatumr777 Empty Editorial, seriously??
nanayadav33 False. There are generally less worker nodes than partitions
george_jost Assuming I have my terminology correct, this is simply because nobody owns an infinite number of processors and therefore if the problem is large enough, we will have less?
mohammadjuberkh1 very nice for beginner of given domain
nikjohn1538 This Question Should be clarified Map/Reduce Library partitions the input data into M pieces of typically 16-64 MB.
True.
If there are M partitions of the input, there are M map workers running simultaneously.
False. There are generally less worker nodes than partitions.
Reduce function accepts intermediate key and a set of values for that key and merges together these values to form possibly a smaller set of values.
True.
Map and Reduce are user defined functions
True.
MapReduce is a restricted programming model?
True.
Thanks for valuable question
pattisrw Hey everyone,
what exactly is a map worker in this context? Would someone recommend a resource to study up on this?
vinodkumar_mvn Technology is some thing which is evolving constantly to new hights each day. The technology we are using today may become outdated tommorow. So to stay in the game of competition we must have to update along with the updating technology. To get the latest updates and to learn latest technologies vist our website .
thomasril The correct answer is False
manchun_pandit you can get MapReduce Training. you can also get all tutorial meterial as a free. you should get Hadoop Tutorial from janbask training.
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