[Data] Add iter_prefetched_bytes stats #58900
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Signed-off-by: Srinath Krishnamachari <srinath.krishnamachari@anyscale.com>
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This pull request introduces a new metric, iter_prefetched_blocks_count, to track the number of prefetched blocks in a Ray Data iterator. The changes are well-integrated, spanning from the core data processing logic to the dashboard for visualization. The implementation is sound and aligns with the existing metrics framework. I have one suggestion to remove a redundant piece of code to improve clarity.
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raulchen
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Nov 22, 2025
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let's report size bytes instead.
Signed-off-by: Srinath Krishnamachari <srinath.krishnamachari@anyscale.com>
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Signed-off-by: Srinath Krishnamachari <68668616+srinathk10@users.noreply.github.com>
raulchen
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Nov 24, 2025
ykdojo
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Nov 27, 2025
> Thank you for contributing to Ray! 🚀 > Please review the [Ray Contribution Guide](https://docs.ray.io/en/master/ray-contribute/getting-involved.html) before opening a pull request. >⚠️ Remove these instructions before submitting your PR. > 💡 Tip: Mark as draft if you want early feedback, or ready for review when it's complete. ## Description > Briefly describe what this PR accomplishes and why it's needed. ### [Data] Add iter_prefetched_blocks stats Report prefetched bytes per iterator as stats. ## Related issues > Link related issues: "Fixes ray-project#1234", "Closes ray-project#1234", or "Related to ray-project#1234". ## Additional information > Optional: Add implementation details, API changes, usage examples, screenshots, etc. --------- Signed-off-by: Srinath Krishnamachari <srinath.krishnamachari@anyscale.com> Signed-off-by: Srinath Krishnamachari <68668616+srinathk10@users.noreply.github.com> Signed-off-by: YK <1811651+ykdojo@users.noreply.github.com>
SheldonTsen
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Dec 1, 2025
> Thank you for contributing to Ray! 🚀 > Please review the [Ray Contribution Guide](https://docs.ray.io/en/master/ray-contribute/getting-involved.html) before opening a pull request. >⚠️ Remove these instructions before submitting your PR. > 💡 Tip: Mark as draft if you want early feedback, or ready for review when it's complete. ## Description > Briefly describe what this PR accomplishes and why it's needed. ### [Data] Add iter_prefetched_blocks stats Report prefetched bytes per iterator as stats. ## Related issues > Link related issues: "Fixes ray-project#1234", "Closes ray-project#1234", or "Related to ray-project#1234". ## Additional information > Optional: Add implementation details, API changes, usage examples, screenshots, etc. --------- Signed-off-by: Srinath Krishnamachari <srinath.krishnamachari@anyscale.com> Signed-off-by: Srinath Krishnamachari <68668616+srinathk10@users.noreply.github.com>
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Description
[Data] Add iter_prefetched_blocks stats
Report prefetched bytes per iterator as stats.
Related issues
Additional information