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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16765) New SteppingRegionSplitPolicy, avoid too aggressive spread of regions for small tables.
Date Tue, 01 Nov 2016 23:53:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15627102#comment-15627102
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Hudson commented on HBASE-16765:
--------------------------------

SUCCESS: Integrated in Jenkins build HBase-Trunk_matrix #1898 (See [https://builds.apache.org/job/HBase-Trunk_matrix/1898/])
HBASE-16765 New SteppingRegionSplitPolicy, avoid too aggressive spread (larsh: rev b7293bf5ad7263b2d835c565f59fe1ccb38d23c7)
* (add) hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SteppingSplitPolicy.java
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.java
HBASE-16765 Amend: Make SteppingSplitPolicy the default. (larsh: rev c12c6ffaec11ff3b702f371df4f3f7c905e07a5c)
* (edit) hbase-common/src/main/resources/hbase-default.xml


> New SteppingRegionSplitPolicy, avoid too aggressive spread of regions for small tables.
> ---------------------------------------------------------------------------------------
>
>                 Key: HBASE-16765
>                 URL: https://issues.apache.org/jira/browse/HBASE-16765
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 2.0.0, 1.3.0, 1.4.0, 1.2.4, 0.98.24, 1.1.8
>
>         Attachments: 16765-0.98.txt
>
>
> We just did some experiments on some larger clusters and found that while using IncreasingToUpperBoundRegionSplitPolicy
generally works well and is very convenient, it does tend to produce too many regions.
> Since the logic is - by design - local, checking the number of regions of the table in
question on the local server only, we end with more regions then necessary.



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