how can i optimize scan speed when use batch scan ?

[覃璐]

hi all.


now i have code like this:


ListRange rangeList=…..;
BatchScanner bs=conn.createBatchScanner();
bs.setRanges(rangeList);




the rangeList has many ranges about 1000,and every range has a random row id 
when i use Range.exact(new Text(…)),
but the speed is so slowly,it maybe spend 2-3s,how can i optimize it ?


thanks