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From "ChiaPing Tsai (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17194) Assign the new region to the idle server after splitting
Date Tue, 29 Nov 2016 17:54:58 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

ChiaPing Tsai updated HBASE-17194:
----------------------------------
    Attachment: evaluation-v0.png

I evaluate the patch by ycsb. The flow is shown below.
# create a table (without pre-split)
# log the region distribution periodically
# put data via ycsb (recordcount=30000000) 



> Assign the new region to the idle server after splitting
> --------------------------------------------------------
>
>                 Key: HBASE-17194
>                 URL: https://issues.apache.org/jira/browse/HBASE-17194
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: ChiaPing Tsai
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-17194.v0.patch, evaluation-v0.png
>
>
> The new regions are assigned to the random servers after splitting, but there always
are some idle servers which don’t be assigned any regions on the new cluster. It is a bad
start of load balance, hence we should give priority to the idle servers for assignment.



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