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Posted to hdfs-issues@hadoop.apache.org by "Tsz Wo Nicholas Sze (JIRA)" <ji...@apache.org> on 2015/11/24 20:58:11 UTC

[jira] [Updated] (HDFS-8617) Throttle DiskChecker#checkDirs() speed.

     [ https://issues.apache.org/jira/browse/HDFS-8617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsz Wo Nicholas Sze updated HDFS-8617:
--------------------------------------
    Component/s:     (was: HDFS)
                 datanode

> Throttle DiskChecker#checkDirs() speed.
> ---------------------------------------
>
>                 Key: HDFS-8617
>                 URL: https://issues.apache.org/jira/browse/HDFS-8617
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 2.7.0
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>         Attachments: HDFS-8617.000.patch
>
>
> As described in HDFS-8564,  {{DiskChecker.checkDirs(finalizedDir)}} is causing excessive I/Os because {{finalizedDirs}} might have up to 64K sub-directories (HDFS-6482).
> This patch proposes to limit the rate of IO operations in {{DiskChecker.checkDirs()}}. 



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