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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-2381) AddFilesWithMissingEntries needs to just find abandoned files, or be deleted
Date Wed, 19 Feb 2014 16:49:25 GMT
Eric Newton created ACCUMULO-2381:
-------------------------------------

             Summary: 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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