[jira] [Updated] (HBASE-20636) Introduce two bloom filter type : ROWPREFIX_FIXED_LENGTH and ROWPREFIX_DELIMITED

["Guangxu Cheng (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-20636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guangxu Cheng updated HBASE-20636:
----------------------------------
    Release Note: 
Add two bloom filter type : ROWPREFIX_FIXED_LENGTH and ROWPREFIX_DELIMITED
1. ROWPREFIX_FIXED_LENGTH: specify the length of the prefix
2. ROWPREFIX_DELIMITED: specify the delimiter of the prefix
Need to specify parameters for these two types of bloomfilter, otherwise the table will fail to create
Example:
create 't1', {NAME => 'f1', BLOOMFILTER => 'ROWPREFIX_FIXED_LENGTH', CONFIGURATION => {'RowPrefixBloomFilter.prefix_length' => '10'}}
create 't1', {NAME => 'f1', BLOOMFILTER => 'ROWPREFIX_DELIMITED', CONFIGURATION => {'RowPrefixDelimitedBloomFilter.delimiter' => '#'}}
         Summary: Introduce two bloom filter type : ROWPREFIX_FIXED_LENGTH and ROWPREFIX_DELIMITED  (was: Introduce two bloom filter type : ROWPREFIX and ROWPREFIX_DELIMITED)

Add Release Note.Thanks [~anoop.hbase]. Thank [~apurtell] for commit. Thanks for all the reviews.

> Introduce two bloom filter type : ROWPREFIX_FIXED_LENGTH and ROWPREFIX_DELIMITED
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-20636
>                 URL: https://issues.apache.org/jira/browse/HBASE-20636
>             Project: HBase
>          Issue Type: New Feature
>          Components: HFile, regionserver, scan
>            Reporter: Guangxu Cheng
>            Assignee: Guangxu Cheng
>            Priority: Major
>             Fix For: 3.0.0, 2.2.0
>
>         Attachments: HBASE-20636.master.001.patch, HBASE-20636.master.002.patch, HBASE-20636.master.003.patch, HBASE-20636.master.004.patch, HBASE-20636.master.005.patch
>
>
> 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.



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