guowangy commented on PR #11722: URL: https://github.com/apache/gluten/pull/11722#issuecomment-4037707027
> @guowangy I draw a graph based on my understanding. Please correct me if I'm wrong: The existing design only has one random I/O access to one mapper output per reducer, but the new design has more random I/O accesses when reading all the segments from one mapper per reducer. > > <img alt="image" width="491" height="703" src="https://private-user-images.githubusercontent.com/52736607/561469832-66399c0e-8acd-43fc-ba2c-31671692aaac.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.uO-S8Fc0CMFjOUbLvmj5CAYsWPO7LTcvv8a3WnovDoU";> Yes, for shuffle reader, that's true. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
![https://private-user-images.githubusercontent.com/52736607/561469832-66399c0e-8acd-43fc-ba2c-31671692aaac.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.uO-S8Fc0CMFjOUbLvmj5CAYsWPO7LTcvv8a3WnovDoU"](https://private-user-images.githubusercontent.com/52736607/561469832-66399c0e-8acd-43fc-ba2c-31671692aaac.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.uO-S8Fc0CMFjOUbLvmj5CAYsWPO7LTcvv8a3WnovDoU"){kind=link}