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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-6828) Separate block replica dispatching from Balancer
Date Fri, 08 Aug 2014 09:19:12 GMT

     [ https://issues.apache.org/jira/browse/HDFS-6828?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Tsz Wo Nicholas Sze updated HDFS-6828:

    Attachment: h6828_20140808c.patch

Vinay, thanks a lot for reviewing the patch!  Here is a new patch incorporated all your comments.

# Fixed.
# Changed all Time.now() to Time.monotonicNow().
# You are right that I should return a trimmed list in Dispatcher#init(..).  Then, Balancer#init(..)
does not have to check shouldIgnore() again.
# Added javadoc.

> Separate block replica dispatching from Balancer
> ------------------------------------------------
>                 Key: HDFS-6828
>                 URL: https://issues.apache.org/jira/browse/HDFS-6828
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: balancer
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>         Attachments: h6828_20140808.patch, h6828_20140808b.patch, h6828_20140808c.patch
> The Balancer class implements two major features, (1) balancing logic for selecting replicas
in order to balance the cluster and (2) block replica dispatching for moving the block replica
around.  This JIRA is to separate (2) from Balancer so that the code could be reused by other
code such as the new data migration tool proposed in HDFS-6801.

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