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From "Rakesh R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7648) Verify the datanode directory layout
Date Fri, 23 Jan 2015 18:42:35 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14289698#comment-14289698
] 

Rakesh R commented on HDFS-7648:
--------------------------------

[~szetszwo] I'm going through the "block ID-based block layout on datanodes" design and I
come across this jira. I'm interested to implement this idea. I feel block report generation
would be feasible one. Could you briefly explain about the verification points if you have
anything specific in your mind. Thanks!

> Verify the datanode directory layout
> ------------------------------------
>
>                 Key: HDFS-7648
>                 URL: https://issues.apache.org/jira/browse/HDFS-7648
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>            Reporter: Tsz Wo Nicholas Sze
>
> HDFS-6482 changed datanode layout to use block ID to determine the directory to store
the block.  We should have some mechanism to verify it.  Either DirectoryScanner or block
report generation do the check.



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