June 2026 monthly summary for facebookincubator/velox: 1) Key features delivered: - GPU-accelerated Iceberg support in Velox-cuDF with new CudfIcebergXX classes, deletion vectors, and equality delete support. This work enables Parquet-based Iceberg data workflows and broader data processing capabilities on the GPU. Related PR: feat(cudf): Add Iceberg support to velox-cudf (#17054). - CI pipeline enhancement to include Velox-cudf tests (Iceberg and SparkSQL), expanding test coverage to Velox experimental/cudf paths and ensuring reliability during CI. Related PR: fix(cudf): Run Velox-cudf iceberg tests in CI (#17704). 2) Major bugs fixed: - CI workflow fixes to ensure Iceberg tests run in CI, addressing gaps in Velox-cudf test coverage and improving test reliability. 3) Overall impact and accomplishments: - Accelerated Iceberg data processing on the GPU pathway, enabling faster analytics and more scalable workloads. - Substantially improved test coverage and CI reliability for Velox-cudf, reducing regression risk and providing greater confidence for production deployments. 4) Technologies/skills demonstrated: - GPU acceleration (nVidia CUDA, cudf) and GPU-accelerated data formats (Iceberg on Velox-cudf). - Advanced delete handling (position delete, equality delete) and deletion file readers. - Roaring bitmaps in GPU context, Parquet data handling, and integration with Velox’s cudf connectors. - CI automation and test orchestration for complex multi-repo workloads.

Month: 2026-05 — Delivered a targeted correctness fix for Deletion Vector I/O in non-run Roaring bitmaps within the IBM/velox repository, aligning behavior with the Roaring bitmap specification and improving data integrity across bitmap operations. The work focused on ensuring writer/reader offsets are always written/read for non-run bitmaps, removing the previous conditional path and preventing spec mismatches for downstream consumers. The change was implemented and reviewed through a dedicated PR, reinforcing Velox’s commitment to correctness and interoperability.

April 2026 (facebookincubator/velox): Focused on improving reliability and developer experience around GitHub API interactions during dependency updates. Delivered actionable error handling enhancements in the update-cudf-deps.sh script to surface failures (e.g., rate limiting, network issues) with clear remediation steps, reducing troubleshooting time and triage cycles across environments.

February 2026 – IBM/velox: Focused on stability of full debug builds and performance improvements for hybrid scan. Delivered two key areas: (1) Build stability for Velox full debug builds through cuDF dependency updates and related RAPIDS components; (2) Hybrid scan performance enhancements using chunked APIs with improved IO and state management. These efforts reduced build fragility, accelerated validation cycles, and boosted data processing throughput for large-scale workloads. Key outcomes include successful full debug build validation, Velox-cuDF tests passing, and alignment with upstream cuDF/RAPIDS changes (PRs and dependencies referenced in commit notes).