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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-1161) Make DN minimum valid volumes configurable
Date Wed, 26 May 2010 22:17:39 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Collins updated HDFS-1161:
------------------------------

    Attachment: hdfs-1161-5.patch

Thanks for taking a look. Patch attached. It's the minimal patch that applies against trunk.
Will move the unit test over to HDFS-811 and the cleanup over to HDFS-1160. 

> Make DN minimum valid volumes configurable
> ------------------------------------------
>
>                 Key: HDFS-1161
>                 URL: https://issues.apache.org/jira/browse/HDFS-1161
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node
>    Affects Versions: 0.21.0, 0.22.0
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>             Fix For: 0.21.0, 0.22.0
>
>         Attachments: hdfs-1161-1.patch, hdfs-1161-2.patch, hdfs-1161-3.patch, hdfs-1161-4.patch,
hdfs-1161-5.patch
>
>
> The minimum number of non-faulty volumes to keep the DN active is hard-coded to 1.  It
would be useful to allow users to configure this value so the DN can be taken offline when
eg half of its disks fail, otherwise it doesn't get reported until it's down to it's final
disk and suffering degraded performance.

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