waitinfuture commented on PR #2373:
URL: https://github.com/apache/celeborn/pull/2373#issuecomment-2037721273

   > @wangshengjie123 Is there any doc or ticket explaining this approach? Also 
for the sort based approach that you mentioned.
   
   The sort based approach is roughly like follows:
   1. Each sub reducer reads from all partition splits for data within its map 
range
   2. The first read request will trigger the partition split file to be sorted 
based on map ids, so each IO will be sequential
   
   
![image](https://github.com/apache/celeborn/assets/948245/09949028-d6f8-4966-be3c-51a027f69524)
   
![image](https://github.com/apache/celeborn/assets/948245/c8ff1791-91cb-4272-8eea-3f3db9895504)
   


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