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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-12434) Add a command to compact all the regions in a regionserver
Date Wed, 12 Nov 2014 01:59:35 GMT

     [ https://issues.apache.org/jira/browse/HBASE-12434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-12434:
-----------------------------------
    Attachment: HBASE-12434-0.98.patch

I cherry picked this nice low risk API addition back to 0.98.

> Add a command to compact all the regions in a regionserver
> ----------------------------------------------------------
>
>                 Key: HBASE-12434
>                 URL: https://issues.apache.org/jira/browse/HBASE-12434
>             Project: HBase
>          Issue Type: Improvement
>          Components: shell
>            Reporter: Liu Shaohui
>            Assignee: Liu Shaohui
>            Priority: Minor
>             Fix For: 2.0.0, 0.98.8, 0.99.2
>
>         Attachments: HBASE-12434-0.98.patch, HBASE-12434-v1.diff
>
>
> When adding a new regionserver to the hbase cluster, the data locality of the regions
in the new regionserver is very low. Most read hdfs requests from these regions are remote
read, not local read. So, the latency of read request to these regions is not stable. 
> Usually we can compact all the regions in the new regionserver to improve the data locality
in offpeak.
> So we add a command: compact_rs in hbase shell.



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