soumilshah1995 commented on PR #15385: URL: https://github.com/apache/iceberg/pull/15385#issuecomment-4501901191
> @soumilshah1995 i verified file skipping by looking at spark UI. If you have any shredded columns, the performance could be worse compared to unshredded or plain json. See #16448 > > <img alt="file_skipping" width="1530" height="1079" src="https://private-user-images.githubusercontent.com/246140/595632918-15efe696-8b96-4943-881c-c67733a35461.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NzkzMDU2MDYsIm5iZiI6MTc3OTMwNTMwNiwicGF0aCI6Ii8yNDYxNDAvNTk1NjMyOTE4LTE1ZWZlNjk2LThiOTYtNDk0My04ODFjLWM2NzczM2EzNTQ2MS5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjYwNTIwJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI2MDUyMFQxOTI4MjZaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT00M2Y1OTYxNzVjM2NlYTQ4MWEzZjhiZDhiMjIxYWJhNzhjNDUwMDE5MDAzYzI3MDEwNzM3MmQyMjdkYmIxNjNkJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCZyZXNwb25zZS1jb250ZW50LXR5cGU9aW1hZ2UlMkZwbmcifQ.Qc1CduK277T2Bxa6zx-oZVKBbxFmagjnbjdKhDCTZSE";> Yes you are correct my test says same unshredded still perform better then shredding -- 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]
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