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

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

Josh Elser created HBASE-17973:
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             Summary: 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


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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