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https://issues.apache.org/jira/browse/HDFS-1161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12869125#action_12869125
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dhruba borthakur commented on HDFS-1161:
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Code looks good. The Unit test should ideally not hardcode the 15 second wait
time (instead wait indefinitely). also, can we achieve the behaviour that Koji
wants using the existing config parameters (instead of creating new config
parameters)?
> 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
>
>
> 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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