How to rename a rowkey

[Bui Ngoc Son]

Hi,

Is there any way to rename a rowkey in Hbase? for example i want to 
change a row key from "abcd_1_2010" to "abcd_1_2011".

If no, what is the best way to copy date from one row to another row? I 
will use it to copy 1st row to new 2nd row, then delete 1st row.

Thanks.