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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 Tue, 21 Apr 2015 18:33:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14505449#comment-14505449
] 

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

Thanks for the pointers Chris! A mock-up is a very good idea; HDFS-5986 and HDFS-6385 are
good examples to follow.

> 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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