aokolnychyi opened a new pull request, #8935: URL: https://github.com/apache/iceberg/pull/8935
The action for rewriting manifests caches the manifest entry DF or does an extra shuffle in order to skip reading the actual manifest files twice. We did this assuming it would increase the performance. However, the caching seems to perform poorly for larger tables as it requires substantial cluster resources. In addition, doing a round-robin repartition is expensive as the entries must be written to disk. The extra write is actually more expensive than the extra read required for the range-based shuffle of manifest entries. Therefore, this PR disables caching by default and removes the optional round-robin repartition step. Instead, we will read the manifests twice. -- 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]
