Guangxu Cheng created HBASE-20636:
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Summary: Introduce two bloom filter type : ROWPREFIX and
ROWPREFIX_DELIMITED
Key: HBASE-20636
URL: https://issues.apache.org/jira/browse/HBASE-20636
Project: HBase
Issue Type: New Feature
Components: regionserver
Environment: As we all know, HBase uses BloomFilter(ROW and ROWCOL) to
filter unnecessary files to improve read performance. But they only support Get
and do not support Scan.
In our company(Tencent), many users need to scan all rows with the same prefix,
such as Tencent Game. Game user's some operational record will be written into
HBase, each game user will have a lot of records, the rowkey is constructed as
userid+'#'+timestamps. So we can scan all records for a given user for a
specified period.
For this scenario, we designed the prefix Bloom filter. If the startRow and
stopRow of the Scan has a valid common prefix, the scan will be allowed to use
BloomFilter to filter files which will enhance the performance of the scan.
Now, this feature has been running on our cluster over a year, and scan
performance for this scenario has been improved by more than one times than
before.
Reporter: Guangxu Cheng
Assignee: Guangxu Cheng
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