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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1848) Datanodes should shutdown when a critical volume fails
Date Thu, 28 Apr 2011 05:13:03 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13026121#comment-13026121
] 

dhruba borthakur commented on HDFS-1848:
----------------------------------------

> Point #1 is limited to allowing an admin to specify that not all of these configured
directories should necessarily be treated 

Fully agree. makes complete sense to me.

> Point #2 is if the datanode experiences some types of failures (eg those caused by a
failed root disk) it should fail-stop.

I am on the fence on this one. It seems like a good idea for a cluster administrator to have
this feature.

> Datanodes should shutdown when a critical volume fails
> ------------------------------------------------------
>
>                 Key: HDFS-1848
>                 URL: https://issues.apache.org/jira/browse/HDFS-1848
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node
>            Reporter: Eli Collins
>             Fix For: 0.23.0
>
>
> A DN should shutdown when a critical volume (eg the volume that hosts the OS, logs, pid,
tmp dir etc.) fails. The admin should be able to specify which volumes are critical, eg they
might specify the volume that lives on the boot disk. A failure in one of these volumes would
not be subject to the threshold (HDFS-1161) or result in host decommissioning (HDFS-1847)
as the decommissioning process would likely fail.

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