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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-17973) Create shell command to identify regions with poor locality
Date Fri, 28 Apr 2017 12:15:04 GMT
Josh Elser created HBASE-17973:

             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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