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Date: Mon, 23 Mar 2015 16:09:10 +0000 (UTC)
From: "Sameet Agarwal (JIRA)" <jira@apache.org>
To: dev@hbase.apache.org
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Subject: [jira] [Created] (HBASE-13316) Reduce the downtime on panned moves
 of regions
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Sameet Agarwal created HBASE-13316:
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             Summary: Reduce the downtime on panned moves of regions
                 Key: HBASE-13316
                 URL: https://issues.apache.org/jira/browse/HBASE-13316
             Project: HBase
          Issue Type: Improvement
          Components: Balancer
    Affects Versions: 2.0.0, 1.0.1, 1.1.1
            Reporter: Sameet Agarwal
            Assignee: Sameet Agarwal
            Priority: Minor
             Fix For: 2.0.0


The current behavior of a region move shuts down a region and then starts is up in another regionserver. This causes increased latency and possibly timeouts till the new region's cache is fully warmed up. We can make a region move less disruptive by warming the cache in the destination region server before shutting dow the old region.
 

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