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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-3021) Limit size of split rows
Date Fri, 25 Jul 2014 16:10:43 GMT
Keith Turner created ACCUMULO-3021:
--------------------------------------

             Summary: Limit size of split rows
                 Key: ACCUMULO-3021
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3021
             Project: Accumulo
          Issue Type: Improvement
    Affects Versions: 1.4.0
            Reporter: Keith Turner
             Fix For: 1.7.0


Just ran into an issue where a very large split row was added to Accumulo.  The large split
row caused the metadata table to split and was pushed up into the root tablet.   This caused
the root tablet to become unresponsive as many clients and tservers tried to scan the root
tablet.  Had to write a custom utility for 1.4 to fix this.

I am curious if 1.5 would have been able to merge it away.  Even if 1.5 could merge it away,
the root tablet becoming unresponsive was really bad.  It took a lot of poking and proding
to get the system to anything.  It would be best to avoid this situation altogether.

Could make the max split size configurable.  This config would be used to limit automatic
and user added splits.





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