deterministic D-Stream mode

[forough <fo...@gmail.com>]

Hi all, 
I have 2 questions:

1. I found out the meaning of "deterministic" in D-Stream model is :
given a particular input, will always produce the same output that is
necessary for recomputation in lineage.
Is it right? 

2. Why spark stream needs to replicate input data for making deterministic
state? what is the relation between deterministic tasks or operations and
replication?

Thanks.



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