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From "jiangyu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6727) Refresh data volumes on DataNode based on configuration changes
Date Fri, 16 Jan 2015 02:28:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14279718#comment-14279718

jiangyu commented on HDFS-6727:

Hi [~eddyxu] , we did this feature in Hadoop 1.x before. I have a question here, if you add
a "hotswap" disk to datanode, obvious  you have data in it. Why don't you call blockreport

> Refresh data volumes on DataNode based on configuration changes
> ---------------------------------------------------------------
>                 Key: HDFS-6727
>                 URL: https://issues.apache.org/jira/browse/HDFS-6727
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>    Affects Versions: 2.5.0, 2.4.1
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>              Labels: datanode
>             Fix For: 2.6.0
>         Attachments: HDFS-6727.000.delta-HDFS-6775.txt, HDFS-6727.001.patch, HDFS-6727.002.patch,
HDFS-6727.003.patch, HDFS-6727.004.patch, HDFS-6727.005.patch, HDFS-6727.006.patch, HDFS-6727.006.patch,
HDFS-6727.007.patch, HDFS-6727.008.patch, HDFS-6727.combo.patch, patchFindBugsOutputhadoop-hdfs.txt
> HDFS-1362 requires DataNode to reload configuration file during the runtime, so that
DN can change the data volumes dynamically. This JIRA reuses the reconfiguration framework
introduced by HADOOP-7001 to enable DN to reconfigure at runtime.

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