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Posted to issues@hbase.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2018/09/17 05:13:00 UTC

[jira] [Commented] (HBASE-10342) RowKey Prefix Bloom Filter

    [ https://issues.apache.org/jira/browse/HBASE-10342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16617095#comment-16617095 ] 

Lars Hofhansl commented on HBASE-10342:
---------------------------------------

I want to pick this up again.

Perhaps all that's needed is a "pre-bloom" coprocessor hook that can perform a transformation before a key is passed to the bloom filter (both read and write), or perhaps take over the entire hash calculation.

[~apurtell]

> RowKey Prefix Bloom Filter
> --------------------------
>
>                 Key: HBASE-10342
>                 URL: https://issues.apache.org/jira/browse/HBASE-10342
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Liyin Tang
>            Priority: Major
>
> When designing HBase schema for some use cases, it is quite common to combine multiple information within the RowKey. For instance, assuming that rowkey is constructed as md5(id1) + id1 + id2, and user wants to scan all the rowkeys which starting by id1. In such case, the rowkey bloom filter is able to cut more unnecessary seeks during the scan.



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