[jira] [Created] (CARBONDATA-2018) Optimization in reading/writing for sort temp row during data loading

["xuchuanyin (JIRA)" <ji...@apache.org>]

xuchuanyin created CARBONDATA-2018:
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             Summary: Optimization in reading/writing for sort temp row during data loading
                 Key: CARBONDATA-2018
                 URL: https://issues.apache.org/jira/browse/CARBONDATA-2018
             Project: CarbonData
          Issue Type: Improvement
          Components: data-load
    Affects Versions: 1.3.0
            Reporter: xuchuanyin
            Assignee: xuchuanyin
             Fix For: 1.3.0


# SCENARIO

Currently in carbondata data loading, during sort process step, records will be sorted partially and spilled to the disk. And then carbondata will read these records and do merge sort.

Since sort step is CPU-tense, during writing/reading these records, we can optimize the serialization/deserialization for these rows and reduce CPU consumption in parsing the rows.

This should enhance the data loading performance.

# RESOLVE
We can pick up the un-sorted fields in the row and pack them as bytes array and skip paring them.

# RESULT

I've tested it in my cluster and seen about 8% performance gained (74MB/s/Node -> 81MB/s/Node).



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