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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13412) Region split decisions should have jitter
Date Tue, 12 May 2015 03:52:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14539178#comment-14539178
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Hudson commented on HBASE-13412:
--------------------------------

FAILURE: Integrated in HBase-0.98 #985 (See [https://builds.apache.org/job/HBase-0.98/985/])
HBASE-13412 ADDENDUM Region split decisions should have jitter (apurtell: rev 06e0e47cab8cab09725dd850a65264f2f2317465)
* hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionSplitPolicy.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ConstantSizeRegionSplitPolicy.java


> Region split decisions should have jitter
> -----------------------------------------
>
>                 Key: HBASE-13412
>                 URL: https://issues.apache.org/jira/browse/HBASE-13412
>             Project: HBase
>          Issue Type: New Feature
>          Components: regionserver
>    Affects Versions: 1.0.0, 2.0.0
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>             Fix For: 2.0.0, 1.1.0, 0.98.13
>
>         Attachments: HBASE-13412-v1.patch, HBASE-13412-v2.patch, HBASE-13412-v3.patch,
HBASE-13412.addendum.0.98-2.patch, HBASE-13412.addendum.0.98.patch, HBASE-13412.patch, hbase-13412.addendum.patch
>
>
> Whenever a region splits it causes lots of IO (compactions are queued for a while). Because
of this it's important to make sure that well distributed tables don't have all of their regions
split at exactly the same time.
> This is basically the same as our compaction jitter.



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