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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8193) Add the ability to delay replica deletion for a period of time
Date Tue, 21 Apr 2015 17:51:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14505364#comment-14505364

Chris Nauroth commented on HDFS-8193:

Thank you for the response.  That clarifies it for me.

If possible, would you please see if there is a way to make the delay visible through metrics
and the web UI?  Perhaps you could even just populate the same fields that were added in HDFS-5986
and HDFS-6385.

> Add the ability to delay replica deletion for a period of time
> --------------------------------------------------------------
>                 Key: HDFS-8193
>                 URL: https://issues.apache.org/jira/browse/HDFS-8193
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: namenode
>    Affects Versions: 2.7.0
>            Reporter: Aaron T. Myers
>            Assignee: Zhe Zhang
> When doing maintenance on an HDFS cluster, users may be concerned about the possibility
of administrative mistakes or software bugs deleting replicas of blocks that cannot easily
be restored. It would be handy if HDFS could be made to optionally not delete any replicas
for a configurable period of time.

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