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https://issues.apache.org/jira/browse/HBASE-4489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13142642#comment-13142642
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Hudson commented on HBASE-4489:
-------------------------------
Integrated in HBase-TRUNK #2402 (See
[https://builds.apache.org/job/HBase-TRUNK/2402/])
[jira] [HBASE-4627] Ability to specify a custom start/end to RegionSplitter
Summary:
[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
CC: JIRA
Reviewers: DUMMY_REVIEWER
Differential Revision: 39
nspiegelberg :
Files :
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/util/RegionSplitter.java
*
/hbase/trunk/src/test/java/org/apache/hadoop/hbase/util/TestRegionSplitter.java
> Better key splitting in RegionSplitter
> --------------------------------------
>
> Key: HBASE-4489
> URL: https://issues.apache.org/jira/browse/HBASE-4489
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.90.4
> Reporter: Dave Revell
> Assignee: Dave Revell
> Fix For: 0.94.0
>
> Attachments: HBASE-4489-branch0.90-v1.patch,
> HBASE-4489-branch0.90-v2.patch, HBASE-4489-branch0.90-v3.patch,
> HBASE-4489-trunk-v1.patch, HBASE-4489-trunk-v2.patch,
> HBASE-4489-trunk-v3.patch, HBASE-4489-trunk-v4.patch,
> HBASE-4489-trunk-v5.patch
>
>
> The RegionSplitter utility allows users to create a pre-split table from the
> command line or do a rolling split on an existing table. It supports
> pluggable split algorithms that implement the SplitAlgorithm interface. The
> only/default SplitAlgorithm is one that assumes keys fall in the range from
> ASCII string "00000000" to ASCII string "7FFFFFFF". This is not a sane
> default, and seems useless to most users. Users are likely to be surprised by
> the fact that all the region splits occur in in the byte range of ASCII
> characters.
> A better default split algorithm would be one that evenly divides the space
> of all bytes, which is what this patch does. Making a table with five regions
> would split at \x33\x33..., \x66\x66...., \x99\x99..., \xCC\xCC..., and
> \xFF\xFF.
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