Hi,

I am new to hadoop and looking for some answers to clear my basic concepts on 
Hadoop.



Will it matter what the data block size is ? 

It is recommended to have a block size of 64 MB, but if we want to have the 
data block size to 128 MB, should this effect the performance ?

Does the size of the map jobs created on each datanodes in anyway depend the 
block size ?



Thanks for the support.



Regards

Syed


                                          

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