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From sunww <spe...@outlook.com>
Subject about rack awareness
Date Fri, 04 Jul 2014 02:31:31 GMT
HiI have two questions about rack awareness.
1、I installed a hadoop2.2 , hbase0.96 cluster, which have 2 racks. rack1 have 10 machines
, rack2 have 5 machines. Because of 3 replicas, rack2 will store more data then rack1.Maybe
I need to move some machines from  rack2 to rack1?If I had more racks, only one have 5 machines
and the others have 10 machines, Will data unbalance more serious? 
2、If some racks share the same  power and switch, is rack awareness necessary ?

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