hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Bharath Mundlapudi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1362) Provide volume management functionality for DataNode
Date Tue, 15 Mar 2011 18:48:29 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13007092#comment-13007092
] 

Bharath Mundlapudi commented on HDFS-1362:
------------------------------------------

Adding to Sanjay's comments. This functionality is Hadoop deployment specific. Meaning some
use hot plug and some doesn't. Also, if any existing/future Hadoop deployments use disk striping,
RAID-0, will this feature work? 



 

> 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: data-node
>    Affects Versions: 0.23.0
>            Reporter: Wang Xu
>            Assignee: Wang Xu
>             Fix For: 0.23.0
>
>         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.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?

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message