[jira] [Resolved] (HDFS-1362) Provide volume management functionality for DataNode

["Lei (Eddy) Xu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-1362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lei (Eddy) Xu resolved HDFS-1362.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.7.0

The hot swap drive feature is completed. Thanks for the reviews from [~atm] and [~cmccabe]!

> Provide volume management functionality for DataNode
> ----------------------------------------------------
>
>                 Key: HDFS-1362
>                 URL: https://issues.apache.org/jira/browse/HDFS-1362
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: datanode
>    Affects Versions: 0.23.0
>            Reporter: Wang Xu
>            Assignee: Wang Xu
>             Fix For: 2.7.0
>
>         Attachments: DataNode Volume Refreshment in HDFS-1362.pdf, HDFS-1362.4_w7001.txt, HDFS-1362.5.patch, HDFS-1362.6.patch, HDFS-1362.7.patch, HDFS-1362.8.patch, HDFS-1362.txt, Provide_volume_management_for_DN_v1.pdf
>
>
> The current management unit in Hadoop is a node, i.e. if a node failed, it will be kicked out and all the data on the node will be replicated.
> As almost all SATA controller support hotplug, we add a new command line interface to datanode, thus it can list, add or remove a volume online, which means we can change a disk without node decommission. Moreover, if the failed disk still readable and the node has enouth space, it can migrate data on the disks to other disks in the same node.
> A more detailed design document will be attached.
> The original version in our lab is implemented against 0.20 datanode directly, and is it better to implemented it in contrib? Or any other suggestion?



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