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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12452) Add regular expression based split policy
Date Wed, 12 Nov 2014 00:05:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14207378#comment-14207378
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stack commented on HBASE-12452:
-------------------------------

Patch looks good.  Needs more doc on when to use it and the kind of splits it will make. 
Paste in as release notes and I can add to class on commit if that suits.

> Add regular expression based split policy
> -----------------------------------------
>
>                 Key: HBASE-12452
>                 URL: https://issues.apache.org/jira/browse/HBASE-12452
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: He Liangliang
>            Assignee: He Liangliang
>            Priority: Minor
>         Attachments: HBASE-12452.patch
>
>
> The current DelimitedKeyPrefixRegionSplitPolicy split policy is not flexible enough to
describe the split point prefix in some case. A regex based split policy is proposed, for
example:
>     ^[^\x00]+\x00[^\x00]+\x00
> means the split point will always be truncated to a prefix at the second \0 char. We
rely on this to implement local secondary index with data types.



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