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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-1281) flush the METADATA table after GC
Date Tue, 16 Apr 2013 17:57:17 GMT
Eric Newton created ACCUMULO-1281:
-------------------------------------

             Summary: flush the METADATA table after GC
                 Key: ACCUMULO-1281
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1281
             Project: Accumulo
          Issue Type: Improvement
          Components: gc
            Reporter: Eric Newton
            Assignee: Eric Newton
            Priority: Trivial
             Fix For: 1.5.0


The METADATA table is often small, with many in-memory writes.  Because it is small, it does
not normally get flushed, which will prune data with the versioning/delete iterators.  Over
time, the many in-memory versions can cause poor performance.

The file garbage collector (gc) will make lots of updates as it runs.  That would be a perfect
time to flush the table and prune the versions.


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