Remove GraphX MessageToPartition for compatibility with sort-based shuffle #1537
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It was used in Graph#partitionBy. Unlike a Tuple2, it marked the key as transient to avoid sending it over the network. However, this is incompatible with sort-based shuffle (SPARK-2045) and is only a minor optimization.
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QA tests have started for PR 1537. This patch merges cleanly. |
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Looks good to me assuming tests work. |
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Thanks for putting this together! |
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QA results for PR 1537: |
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I've merged this. Thanks! |
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…uffle MessageToPartition was used in `Graph#partitionBy`. Unlike a Tuple2, it marked the key as transient to avoid sending it over the network. However, it was incompatible with sort-based shuffle (SPARK-2045) and represented only a minor optimization: for partitionBy, it improved performance by 6.3% (30.4 s to 28.5 s) and reduced communication by 5.6% (114.2 MB to 107.8 MB). Author: Ankur Dave <[email protected]> Closes apache#1537 from ankurdave/remove-MessageToPartition and squashes the following commits: f9d0054 [Ankur Dave] Remove MessageToPartition ab71364 [Ankur Dave] Remove unused VertexBroadcastMsg
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MessageToPartition was used in
Graph#partitionBy. Unlike a Tuple2, it marked the key as transient to avoid sending it over the network. However, it was incompatible with sort-based shuffle (SPARK-2045) and represented only a minor optimization: for partitionBy, it improved performance by 6.3% (30.4 s to 28.5 s) and reduced communication by 5.6% (114.2 MB to 107.8 MB).