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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/07/13 15:04:51 UTC

[GitHub] [arrow] jorgecarleitao commented on pull request #7729: ARROW-9420 [Rust][DataFusion] Added repartion physical plan

jorgecarleitao commented on pull request #7729:
URL: https://github.com/apache/arrow/pull/7729#issuecomment-657614516


   One thing that is not clear to me yet is the idiom to handle RecordBatch and partitions. My understanding is that a Partition can be executed in parallel (thread), but a RecordBatch is generally executed on the same thread, i.e. we normally loop through each RecordBatch using the same thread.
   
   Is the goal of RecordBatch to split a partition in smaller chunks of data to avoid too much memory usage?
   
   In this PR, I have not merged all the RecordBatches within a given partition in a single batch, and instead kept them separate. I am not sure if this is the correct approach here.


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