HBase Index: indexed table or lucene index

[sallonchina]

Hi, everyone. I am focusing on improve data query performance from HBase and 
found that there are secondary index and lucene index built by mapreduce. I am 
not clear whether both index are the same. If not, which is more helpful to 
data query? 

Thanks.

Best Wishes!
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刘祥龙  Liu Xianglong