[jira] [Reopened] (HBASE-17973) Create shell command to identify regions with poor locality

["Josh Elser (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-17973?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Josh Elser reopened HBASE-17973:
--------------------------------

Apparently I'm terrible at writing Ruby tests for HBase.

Basic syntax error.. will resubmit with some more robust tests..

> Create shell command to identify regions with poor locality
> -----------------------------------------------------------
>
>                 Key: HBASE-17973
>                 URL: https://issues.apache.org/jira/browse/HBASE-17973
>             Project: HBase
>          Issue Type: Improvement
>          Components: shell
>            Reporter: Josh Elser
>            Assignee: Josh Elser
>             Fix For: 2.0.0
>
>         Attachments: HBASE-17973.001.patch, HBASE-17973.002.patch
>
>
> The data locality of regions often plays a large role in the efficiency of HBase. Compactions are also expensive to execute, especially on very large tables. The balancer can do a good job trying to maintain locality (when tuned properly), but it is not perfect.
> This creates a less-than-desirable situation where it's a costly operation to take a cluster with spotty poor locality (e.g. a small percentage of regionservers with poor locality).
> We already have this information available via the {{ClusterStatus}} proto. We can easily write a shell command that can present regions which are lacking a certain percentage of locality.



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