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From "Xiao Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12947) Limit the number of Snapshots allowed to be created for a Snapshottable Directory
Date Fri, 22 Dec 2017 04:52:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16300959#comment-16300959
] 

Xiao Chen commented on HDFS-12947:
----------------------------------

Idea of adding a config sounds good, but -1 on changing the default for compat reasons.

> Limit the number of Snapshots allowed to be created for a Snapshottable Directory
> ---------------------------------------------------------------------------------
>
>                 Key: HDFS-12947
>                 URL: https://issues.apache.org/jira/browse/HDFS-12947
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Shashikant Banerjee
>            Assignee: Shashikant Banerjee
>         Attachments: HDFS-12947.001.patch
>
>
> Currently, A snapshottable directory is able to accommodate 65,536 snapshots. In case
a directory has large no of snapshots , deletion of any of the earlier snapshots take a lot
of time which might lead to namenode crash (HDFS-11225).
> This jira is introduced to limit the no of the snapshots under a snapshottable directory
to a reasonable value(say 10) which can be overriden.



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