Hi?? I wrote a program which function is to extract some data from a HBase table. According to business requirements I had to use the PrefixFilter and the SingleColumnValueFilter to filter the data. The program ran very fast and returned in 1 sec.
Considering I just need the rowkey of each record in my final result, I tried to improve my program by using the PrefixFilter + SingleColumnValueFilter + FirstKeyOnlyFitler. To my surprise the program ran very slow this time. It run about 20min and still not finished. So I had to kill it. Does anybody know the reason that cause my program run such slow? Since I set the PrefixFilter as the first filter in the FilterList object, I think the program should ran fast. Many Thanks!
