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