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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8193) Add the ability to delay replica deletion for a period of time
Date Wed, 27 May 2015 17:36:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14561342#comment-14561342
] 

Zhe Zhang commented on HDFS-8193:
---------------------------------

HDFS-8486 is another use case for the proposed block-level protection.

> 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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