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Exact Usable space After Replication & Balancer

Question asked by pratap20 on Mar 24, 2014
Latest reply on Mar 25, 2014 by Ted Dunning
I am going to install MapR cluster on 4 nodes with 500gbx2(1TB) drives each. I want to set 3x replication & balancer.But My question is how much usable space I will get. Either i will get 70 % of 4TB or 70 % of 1.3 TB.How much space will metadata will occupy?