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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2381) AddFilesWithMissingEntries needs to just find abandoned files, or be deleted
Date Thu, 27 Mar 2014 19:49:20 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13949852#comment-13949852
] 

Josh Elser commented on ACCUMULO-2381:
--------------------------------------

>From Eric Newton, "I think that AddFilesWithMissingEntries should be removed, without
a deprecation cycle."

Taking that with what Keith said, I would be in favor of removing the utility in its current
state and creating a new utiliity that does just what Keith described. 

> AddFilesWithMissingEntries needs to just find abandoned files, or be deleted
> ----------------------------------------------------------------------------
>
>                 Key: ACCUMULO-2381
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2381
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.6.0
>            Reporter: Eric Newton
>            Priority: Minor
>
> The usefulness of the AddFilesWithMissingEntries utility is questionable.
> #) it's very dangerous: it updates the metadata table of online tablets without checking
or warning users
> #) there's no use case for wanting to re-incorporate abandoned metadata files for the
metadata table
> #) the primary use case for this utility is to find abandoned files
> #) the list of files must fit in RAM, which probably requires changing jvm options on
large systems
> #) the quality and stability of accumulo has improved to the point where having these
sorts of crazy fix-it utilities is more trouble than they are worth
> #) as noted in ACCUMULO-2077, it does not work on multi-volume systems
> It would be nice to look for abandoned files, and it might even be worth doing in the
GC on a continuous basis. 



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