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From "Rodrigo Schmidt (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1111) getCorruptFiles() should give some hint that the list is not complete
Date Sat, 26 Jun 2010 01:03:51 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12882793#action_12882793
] 

Rodrigo Schmidt commented on HDFS-1111:
---------------------------------------

The RaidNode extension is not a reason, it's an example of tool that could benefit from that
design.

The meaning of "external" is context-dependent. I meant "external to the namenode", you assumed
"external to HDFS".

I would like to understand better the motivation behind this discussion before proceeding.
I wouldn't like to transform this into a long thread about details and history behind HDFS-729.

> getCorruptFiles() should give some hint that the list is not complete
> ---------------------------------------------------------------------
>
>                 Key: HDFS-1111
>                 URL: https://issues.apache.org/jira/browse/HDFS-1111
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Rodrigo Schmidt
>            Assignee: Rodrigo Schmidt
>         Attachments: HADFS-1111.0.patch
>
>
> If the list of corruptfiles returned by the namenode doesn't say anything if the number
of corrupted files is larger than the call output limit (which means the list is not complete).
There should be a way to hint incompleteness to clients.
> A simple hack would be to add an extra entry to the array returned with the value null.
Clients could interpret this as a sign that there are other corrupt files in the system.
> We should also do some rephrasing of the fsck output to make it more confident when the
list is not complete and less confident when the list is known to be incomplete.

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