Joy-2000 opened a new pull request, #18103: URL: https://github.com/apache/hudi/pull/18103
…ket index ### Describe the issue this Pull Request addresses When flink stream read a mor table with bucket index, `MergeOnReadInputSplit`s are distributed only by bucket id % parallelism. If the parallelism is greater than the bucket number, the higher read subtask id will not process any splits: 186 partitions and 10 buckets in each partition: <img width="4538" height="2128" alt="image" src="https://github.com/user-attachments/assets/61ae6e08-5fb9-41b4-a2ce-33a0281698ba"; /> So I think partition path and bucket id both should be taken into account, which helps to avoid resources waste and hotspot. <img width="2271" height="1012" alt="截屏2026-02-05 21 47 43" src="https://github.com/user-attachments/assets/8e5f2803-06f5-440c-82d5-cf88a9e4876e"; /> <!-- Either describe the issue inline here with motivation behind the changes (or) link to an issue by including `Closes #<issue-number>` for context. If this PR includes changes to the storage format, public APIs, or has breaking changes, use `!` (e.g., feat!: ...) --> ### Summary and Changelog <!-- Short, plain-English summary of what users gain or what changed in behavior. Followed by a detailed log of all the changes. Highlight if any code was copied. --> ### Impact <!-- Describe any public API or user-facing feature change or any performance impact. --> ### Risk Level <!-- Accepted values: none, low, medium or high. Other than `none`, explain the risk. If medium or high, explain what verification was done to mitigate the risks. --> ### Documentation Update <!-- Describe any necessary documentation update if there is any new feature, config, or user-facing change. If not, put "none". - The config description must be updated if new configs are added or the default value of the configs are changed. - Any new feature or user-facing change requires updating the Hudi website. Please follow the [instruction](https://hudi.apache.org/contribute/developer-setup#website) to make changes to the website. --> ### Contributor's checklist - [ ] Read through [contributor's guide](https://hudi.apache.org/contribute/how-to-contribute) - [ ] Enough context is provided in the sections above - [ ] Adequate tests were added if applicable -- 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]
