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From "donhoff_h" <165612...@qq.com>
Subject 回复: HBase Filter Problem
Date Wed, 23 Sep 2015 09:01:17 GMT
Hi,

There are 90 Million records in the table. And I use the the MUST_PASS_ALL for all my filters.
 When I use PrefixFilter + SingleColumnValueFilter, it returned fast. So I supposed that the
combination of PrefixFilter + SingleColumnValueFilter + FirstKeyOnlyFilter should be fast.
But the fact is just in contrast. Do you know the reason that cause it?

Thanks!



------------------ 原始邮件 ------------------
发件人: "Fulin Sun";<sunfl@certusnet.com.cn>;
发送时间: 2015年9月23日(星期三) 下午4:53
收件人: "HBase User"<user@hbase.apache.org>; 

主题: 回复: HBase Filter Problem



Hi , there

How many rows are there in the hbase table ? You want to achive the default FilterList.Operator.MUST_PASS_ALL
or 
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.


Best,
Sun.




CertusNet

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