Is hbase has default secondary index feature?

[#1]

Is hbase has default support of secondary index....

On many site they suggested to use CoProcessor or Hindex

If hbase has secondary index support or any alternatives how to achieve these, can any one please explain......

if hbase has no secondary index, How hbase perform in column qualifier based scan like [scan 'tablename',{COLUMNS => ['column1']}]

[#2]

I'm guessing you've already seen http://hbase.apache.org/0.94/book/secondary.indexes.html which basically is telling you that you'll need to have a second table whose rowkey is your "secondary index" and is only being used to find the rowkey needed for the actual table. The coprocessor strategy, as I understand it, is to just formalize & automate the "dual-write secondary index" strategy. Good luck and happy Hadooping!