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From "Nicolas Spiegelberg (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-4627) Ability to specify a custom start/end to RegionSplitter
Date Mon, 07 Nov 2011 17:08:51 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4627?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nicolas Spiegelberg updated HBASE-4627:
---------------------------------------

    Comment: was deleted

(was: nspiegelberg requested code review of "[jira] [HBASE-4627] Ability to specify a custom
start/end to RegionSplitter".
Reviewers: Karthik, JIRA

  [HBASE-4627]

  added a custom start/end row to RegionSplitter.  Also solved
  an off-by-one error because the end row is prefix-inclusive and not
  exclusive.

  <a href="https://issues.apache.org/jira/browse/HBASE-4489" title="Better key splitting
in RegionSplitter"><del>HBASE-4489</del></a> changed the default endKey
on HexStringSplit from 7FFF... to FFFF...  While this is correct, existing users of 0.90 RegionSplitter
have 7FFF as the end key in their schema and the last region will not split properly under
this new code.  We need to let the user specify a custom start/end key range for when situations
like this arise.  Optimally, we should also write the start/end key in META so we could figure
this out implicitly instead of requiring the user to explicitly specify it.

TEST PLAN
   - mvn test -Dtest=TestRegionSplitter

REVISION DETAIL
  https://reviews.facebook.net/D39

AFFECTED FILES
  src/main/java/org/apache/hadoop/hbase/util/Bytes.java
  src/main/java/org/apache/hadoop/hbase/util/RegionSplitter.java
  src/test/java/org/apache/hadoop/hbase/util/TestRegionSplitter.java
)
    
> Ability to specify a custom start/end to RegionSplitter
> -------------------------------------------------------
>
>                 Key: HBASE-4627
>                 URL: https://issues.apache.org/jira/browse/HBASE-4627
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.94.0
>            Reporter: Nicolas Spiegelberg
>            Assignee: Nicolas Spiegelberg
>         Attachments: D39.1.patch, D39.1.patch, D39.1.patch
>
>
> HBASE-4489 changed the default endKey on HexStringSplit from 7FFF... to FFFF...  While
this is correct, existing users of 0.90 RegionSplitter have 7FFF as the end key in their schema
and the last region will not split properly under this new code.  We need to let the user
specify a custom start/end key range for when situations like this arise.  Optimally, we should
also write the start/end key in META so we could figure this out implicitly instead of requiring
the user to explicitly specify it.

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