[jira] [Created] (SPARK-14186) Size awareness during spill and shuffle

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

He Tianyi created SPARK-14186:
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             Summary: Size awareness during spill and shuffle
                 Key: SPARK-14186
                 URL: https://issues.apache.org/jira/browse/SPARK-14186
             Project: Spark
          Issue Type: Improvement
          Components: Shuffle, Spark Core
    Affects Versions: 1.6.0
            Reporter: He Tianyi
            Priority: Minor


Currently during spilling of a collection of record, sorter calls {{createTempShuffleBlock}} for allocating a local block. 
This call provides no size information about required block. Without knowledge of estimated size, this makes customized allocation strategy hard to implement .
On the other hand, theoretically both {{PartitionedPairBuffer}} and {{PartitionedAppendOnlyMap}} are able to track its estimated size. 
In this case, it is convenient to extract size information and pass it as parameter to {{createTempShuffleBlock}}.



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