James Lamb

Built-in R2 (R-squared) metric

5

## Description LightGBM should add a built-in R^2 metric. ## Benefits of this work * prevents the need to implement this metric in a custom function *(as seen in #6982,...

## Summary As of this writing, LightGBM is using `Boost` 1.74 https://github.com/microsoft/LightGBM/blob/195c26fc7b00eb0fec252dfe841e2e66d6833954/.ci/setup.sh#L110-L112 https://github.com/microsoft/LightGBM/blob/195c26fc7b00eb0fec252dfe841e2e66d6833954/cmake/IntegratedOpenCL.cmake#L2 The project should update to at least `Boost` 1.86. ## Motivation * necessary to support the GPU...

## Summary There are now GitHub-hosted Windows 11 `arm64` runners!!! https://github.blog/changelog/2025-04-14-windows-arm64-hosted-runners-now-available-in-public-preview/ LightGBM should use these: * to test that the project builds on Windows `arm64` * to build distribute Windows...

[python-package] [dask] Dask estimators raise an unavoidable warning

7

## Description When training a model with the `lightgbm.dask` estimators, this warning is always emitted: > /Users/runner/miniforge/envs/test-env/lib/python3.11/site-packages/lightgbm/dask.py:549: UserWarning: Parameter n_jobs will be ignored. _log_warning(f"Parameter {param_alias} will be ignored.") Nothing in...

[RFC] make `deterministic` parameter more thorough?

6

## Proposal When `deterministic = true` in parameters, other configuration values should be overwritten with values that will reduce randomness, **even if those values make LightGBM slower or more resource-intensive**....

**Is your feature request related to a problem? Please describe.** Today, this project relies directly on the images built from https://github.com/rapidsai/ci-imgs https://github.com/rapidsai/docker/blob/f49af7baf2adb3cb20b748e4fcee3b45e2edaa6a/Dockerfile#L18 That has been convenient (for example, `ci-imgs` takes...

Closes #832 Follow-up to https://github.com/rapidsai/docker/pull/836#discussion_r2674112913 In #836, this repo's dependency on https://github.com/rapidsai/ci-imgs was removed by replacing `FROM rapidsai/miniforge-cuda` with the inline contents of the `Dockerfile` used to produce that image....

container-canary CI check is flaky: "unexpected commit digest"

1

## Description Over the last few days, I've observed the `validate` jobs in CI often failing like this: > failed commit on ref "layer-sha256:2609f790a90ab5307cbbb99bd5de7e5912f440c225ffbf91122d212f48a1dfcf": commit failed: unexpected commit digest sha256:c3728131ea5aa7dddea03141cea9af41b08c03c2a6a6a0fdca0b37d13341f1f5,...

## Description The `rapidsai/notebooks` image is an extension of `rapidsai/base` that that has Jupyterlab. It comes pre-loaded with some RAPIDS notebooks and all the dependencies to run them. It also...

## Description This project currently runs a bunch of RAPIDS notebooks, collects their logs in a few tarballs, and uploads those tarballs to `downloads.rapids.ai`. See paths like the following at...