Hi all,
I am wondering how to choose the proper ec profile for new luminous ec rbd 
image.
If I set the k too high what the draw back would be?

Is it a good idea to set k=10 m=2? It sounds attempting the overhead of storage 
capacity is low and the redundancy is good.

What is the difference for storage safety(redundancy ) between k=10 m=2 and k=4 
m=2?

What would be a good ec profile for archive purpose(decent write perfomance and 
just ok read performace)?

Thanks
2017-10-30



Frank
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