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From sounakr <...@git.apache.org>
Subject [GitHub] incubator-carbondata issue #604: [CARBONDATA-691] After Compaction records c...
Date Fri, 03 Mar 2017 12:21:46 GMT
Github user sounakr commented on the issue:

    https://github.com/apache/incubator-carbondata/pull/604
  
    @jackylk : This problem will get reproduce in a multi node system where a single Load
will create multiple carbon data file is by multiple tasks. I have tested the code changes
in a multi node cluster with large data and output ic coming correctly. 
    Another problem observed while testing is choosing the correct cardinality of the new
segment formed due to compaction. Previously we used to copy the last segment cardinality
to the new compacted segment. But with IUD features updates can run on any segments and in
case the updates happens on any intermediate segments then there is high probability that
cardinality of that segment will be more than the last segment. So now instead of copying
the cardinality from the last segment we calculate the highest cardinility values from all
the segments. 


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