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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10956) Remove rename/delete performance penalty when not using snapshots
Date Tue, 04 Oct 2016 16:34:21 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Daryn Sharp updated HDFS-10956:
    Status: Patch Available  (was: Open)

> Remove rename/delete performance penalty when not using snapshots
> -----------------------------------------------------------------
>                 Key: HDFS-10956
>                 URL: https://issues.apache.org/jira/browse/HDFS-10956
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: HDFS-10956.patch
> When deleting or renaming directories, the entire subtree(s) is scanned for snapshottable
directories.  The performance penalty may become very expensive for dense trees.  The snapshot
manager knows if snapshots are in use, so clusters not using snapshots should not take the
performance penalty. 

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