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From "Varun Vasudev (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1781) NM should allow users to specify max disk utilization for local disks
Date Wed, 05 Mar 2014 05:03:43 GMT

    [ https://issues.apache.org/jira/browse/YARN-1781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13920503#comment-13920503
] 

Varun Vasudev commented on YARN-1781:
-------------------------------------

> 1. Disk Size can come down when some tasks finishes and service deletes few data from
local directory.
> There are more chances that this Disk Full may be temporary scenario because of many
tasks accessing local directories.
>
> So there can be counter checks to ensure that these directories are added back to good
list of directories.
> Else these directory may lost.

This will be taken care when I fix YARN-90 which brings back bad disks once they've recovered.

> NM should allow users to specify max disk utilization for local disks
> ---------------------------------------------------------------------
>
>                 Key: YARN-1781
>                 URL: https://issues.apache.org/jira/browse/YARN-1781
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>         Attachments: apache-yarn-1781.0.patch
>
>
> This is related to YARN-257(it's probably a sub task?). Currently, the NM does not detect
full disks and allows full disks to be used by containers leading to repeated failures. YARN-257
deals with graceful handling of full disks. This ticket is only about detection of full disks
by the disk health checkers.
> The NM should allow users to set a maximum disk utilization for local disks and mark
disks as bad once they exceed that utilization. At the very least, the NM should at least
detect full disks.



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