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https://issues.apache.org/jira/browse/HBASE-2844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12889442#action_12889442
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HBase Review Board commented on HBASE-2844:
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Message from: "Pranav Khaitan" <[email protected]>
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This is an automatically generated e-mail. To reply, visit:
http://review.hbase.org/r/334/
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Review request for hbase, Jonathan Gray, Karthik Ranganathan, and Kannan
Muthukkaruppan.
Summary
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This patch is for capping the number of regions on a region server depending on
different use-cases. We add a parameter in the config file which can be used by
the user to set this value. The default value is INT_MAX.
This addresses bug HBASE-2844.
http://issues.apache.org/jira/browse/HBASE-2844
Diffs
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trunk/src/main/java/org/apache/hadoop/hbase/regionserver/CompactSplitThread.java
964968
trunk/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
964968
trunk/src/main/resources/hbase-default.xml 964968
trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServer.java
PRE-CREATION
Diff: http://review.hbase.org/r/334/diff
Testing
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Existing tests passing. Written more specialized tests at HRegionServer level
Thanks,
Pranav
> Capping the number of regions
> -----------------------------
>
> Key: HBASE-2844
> URL: https://issues.apache.org/jira/browse/HBASE-2844
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: Pranav Khaitan
> Assignee: Pranav Khaitan
> Priority: Minor
>
> It may sometimes be advantageous to prevent the number of regions from
> growing very large. This may happen if the values are large in size even
> though the number of keyvalues are not large. If the number of regions
> becomes too large, then it is difficult to accommodate the memstore for each
> region in memory. In such cases, we either have to flush out memstore to disk
> or decrease size of each memstore.
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