What is the difference Hadoop1 and Hadoop2 is?

[Study notes]

What is the difference Hadoop1 and Hadoop2 is? Mark -to-win @ Mark java community: the original Hadoop1 of Mapreduce also of resource management, and also of data processing and computing. The MapReduce only and exclusively Hadoop2 data calculation processing. YARN resource management and do things. Such other computing frameworks such as the introduction of a spark and can Tez. Hadoop eco-development and expansion of the circle. Who can refuse to develop it?

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