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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDFS-10359) Allow trigger block report from all datanodes
Date Wed, 04 May 2016 17:53:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15271076#comment-15271076
] 

Daryn Sharp edited comment on HDFS-10359 at 5/4/16 5:52 PM:
------------------------------------------------------------

I don't like this dangerous idea because it would be far too easy for a naive admin to bury
their cluster.  I agree with Chris that this should be a script, but not part of official
hdfs.

More importantly, forcing a full block report will not detect missing or corrupt blocks. 
The DN will just send its in-memory state.


was (Author: daryn):
I don't like this dangerous idea because it would be far too easy for a naive admin to bury
their cluster.  I agree with Chris that this should be a script, but not part of official
hdfs.

More importantly, forcing a full block report will detect missing or corrupt blocks.  The
DN will just send its in-memory state.

> Allow trigger block report from all datanodes
> ---------------------------------------------
>
>                 Key: HDFS-10359
>                 URL: https://issues.apache.org/jira/browse/HDFS-10359
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 2.7.0, 2.6.1
>            Reporter: Tao Jie
>
> Since we have HDFS-7278 allows trigger block report from one certain datanode. It would
be helpful to add a option to this command to trigger block report from all datanodes.
> Command maybe like this:
> *hdfs dfsadmin -triggerBlockReport \[-incremental\] <datanode_host:ipc_port|all>*



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