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Date: Mon, 1 Jun 2015 17:45:18 +0000 (UTC)
From: "Changgeng Li (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Updated] (HBASE-13682) Compute HDFS locality in parallel.
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     [ https://issues.apache.org/jira/browse/HBASE-13682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Changgeng Li updated HBASE-13682:
---------------------------------
    Attachment: HBASE-13638-v2.patch

> Compute HDFS locality in parallel.
> ----------------------------------
>
>                 Key: HBASE-13682
>                 URL: https://issues.apache.org/jira/browse/HBASE-13682
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Elliott Clark
>            Assignee: Changgeng Li
>         Attachments: HBASE-13638-v2.patch
>
>
> Right now when the balancer needs to know about region locality it asks the cache in serial. When the cache is empty or expired it goes to the NN.
> On larger clusters with lots of blocks this can be really slow. That means that balancer is un-usable while masters are being restarted.


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