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Posted to issues@hbase.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2016/02/10 20:41:18 UTC
[jira] [Updated] (HBASE-15249) Provide lower bound on number of
regions in region normalizer for pre-split tables
[ https://issues.apache.org/jira/browse/HBASE-15249?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ted Yu updated HBASE-15249:
---------------------------
Attachment: HBASE-15249.v1.txt
Draft patch
> Provide lower bound on number of regions in region normalizer for pre-split tables
> ----------------------------------------------------------------------------------
>
> Key: HBASE-15249
> URL: https://issues.apache.org/jira/browse/HBASE-15249
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: Ted Yu
> Attachments: HBASE-15249.v1.txt
>
>
> AMS (Ambari Metrics System) developer found the following scenario:
> Metrics table was pre-split with many regions on large cluster.
> After some time, AMS stopped working because region normalizer merged the regions into few big regions which were not able to serve high read / write load.
> We should consider setting reasonable lower bound on region count.
> If the table is pre-split, we can use initial region count as the lower bound.
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