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From "Fulin Sun" <su...@certusnet.com.cn>
Subject 回复: HBase Filter Problem
Date Wed, 23 Sep 2015 08:53:39 GMT
Hi , there

How many rows are there in the hbase table ? You want to achive the default FilterList.Operator.MUST_PASS_ALL
you just want to use or conditions for these filters ? 

I think the reason is that this kind of filter list just go more scan work and lower performance.



发件人: donhoff_h
发送时间: 2015-09-23 16:33
收件人: user
主题: HBase Filter Problem
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!
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