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https://issues.apache.org/jira/browse/HDFS-10956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15546016#comment-15546016
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Kihwal Lee edited comment on HDFS-10956 at 10/4/16 5:17 PM:
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Actually I've been thinking about doing this myself. We are getting closer to
fulfilling the initial promise of "don't worry, snapshot won't affect you if
you don't use it".
was (Author: kihwal):
Actually I've been thinking about doing this myself. Finally we are getting
close to fulfilling the initial promise of "don't worry, snapshot won't affect
you if you don't use it".
> 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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