Month: 2025-10 — Focused on stabilizing the CI/build pipeline for oap-project/velox, delivering tangible reliability and performance gains. Key changes included freeing Docker build disk space, fixing Ubuntu container setup to use sudo via environment variable, and upgrading fmt to 11.2.0 with necessary code/tests compatibility adjustments. These changes reduce build failures, speed up iteration cycles, and support more predictable release pipelines.

Monthly summary for 2025-09 focusing on business value and technical achievements across Velox and Presto: Key features delivered: - CallTypedExpr variadic constructor added in oap-project/velox to simplify usage and reduce boilerplate when building expressions. (commit 97b83102a35657390b5496d617a53d417b603b11) - GCC13 compatibility fix in oap-project/velox to resolve compile errors by adjusting hidden virtual declarations and initializer_list handling, restoring cross-version build stability. (commit 70c6392eedff7a0c41bf1f1dc72af35dbcb29389) - Velox mono-library link error fix in prestodb/presto by disabling VELOX_MONO_LIBRARY to enable native execution build without linking issues. (commit 809ae7bcfb6581a4d36bc4fca833c5d9944caad1) Major bugs fixed: - Repaired GCC13 compile errors affecting Velox by aligning hidden virtual declarations and initializer_list behavior, improving build reliability. - Eliminated native build link failures related to Velox mono-library in Presto by applying a targeted build flag change, restoring end-to-end build success. Overall impact and accomplishments: - Improved build stability across GCC13 and cross-repo integration, enabling smoother CI and faster delivery. - Reduced boilerplate and improved developer ergonomics for expression construction, accelerating feature work. - Restored end-to-end native execution builds, reducing triage time and enabling more reliable performance testing. Technologies/skills demonstrated: - C++ language features (variadic constructors, type safety) and expression construction patterns. - Build system discipline: GCC13 compatibility, hidden virtual declarations, initializer_list handling, and build flag management. - Cross-repo coordination and debugging across Velox and Presto to resolve integration issues.

August 2025 monthly summary for prestodb/presto: Focused on stabilizing and speeding up the PrestoC++ CI workflow, enabling Parquet and Spatial support by default, and aligning feature flags with Velox build options to improve consistency and reduce misconfigurations. Delivered measurable improvements in CI reliability, test coverage, and build efficiency, enabling faster feedback loops and simpler configuration for development and quality assurance.

July 2025 Monthly Summary: Championing stability and feature parity for native execution with a focus on geo analytics, Velox integration, and modernized tooling. Delivered spatial capabilities in Presto's native execution, upgraded Velox integration, and modernized codebase to C++20, while reinforcing build and observation reliability through targeted fixes in Docker images and Arrow/Prometheus instrumentation. These efforts collectively reduce churn, accelerate geo workloads, and strengthen the reliability of the Velox-based execution path.

June 2025 monthly summary focusing on reliability improvements and build stability across prestodb/presto and oap-project/velox. Highlights include robust CentOS 9 dependency installation and a macro redefinition fix to ensure clean builds. These changes reduce platform friction and demonstrate strong shell scripting, C++ compilation hygiene, and cross-repo collaboration. Overall impact: fewer deployment failures on CentOS 9 and smoother developer experience.

May 2025 monthly summary for oap-project/velox: Delivered a critical FBOS dependency upgrade and stability fixes to ensure compatibility with updated libraries and improved test reliability. Upgraded FBOS to v2025.04.28.00, addressed namespace issues and coroutine-related segfaults in remote function tests, updated patch files, and added new dependencies (xxhash, fast float). Change captured by commit 02874d07f47d346a9c6729de4394893e8357e1b6. This work reduces test flakiness and runtime errors, improves build stability, and aligns Velox with the latest OSS dependencies, enabling smoother downstream integration and reduced maintenance. Key achievements: - FBOS upgrade to v2025.04.28.00 (commit 02874d07f47d346a9c6729de4394893e8357e1b6) - Fixed namespace issues and coroutine-related segfaults in remote function tests - Updated patch files and added new dependencies (xxhash, fast float) for compatibility - Improved build stability and test reliability across the Velox codebase

February 2025 monthly summary: Key feature delivered—CI Build Optimization: Linux Debug with Clang for prestodb/presto—switched the Linux debug CI build from GCC to Clang to reduce visible disk usage on GitHub runners; updated CI workflows and CMake configurations to ensure explicit linking with libatomic, increasing build reliability. Commit 928fdb314d7b570604aeba72dbc906a64b446cc8 documented. This work improves CI efficiency, stability, and sets the stage for further compiler-based optimizations in CI pipelines.

January 2025 monthly performance summary focusing on business value and technical achievements. Key outcomes: - PrestoC++ Build Disk Space Optimization and Monitoring: reduced disk usage in the debug build by removing unnecessary data/tests and using a smaller dependency image; plus added disk usage monitoring in native build CI to detect space issues early. - Velox Linux build and dependency management modernization: refactored build to separate Thrift installation from Arrow on Linux, moved Arrow download source to GitHub for reliability, and removed the bundled Thrift dependency from Arrow to implement a separate installation step, improving build reliability and dependency management. - CI stability improvement: removed flaky Spark test to stabilize CI until flakiness is addressed. - Secure logging for connectors: prevented leakage of sensitive information by logging only property keys for connector configurations, not their values. Overall impact and accomplishments: - Reduced build footprint and faster CI feedback loops, enabling more rapid iteration and feature delivery. - Increased reliability of CI and build processes, lowering risk of failed PRs/releases due to flaky tests. - Strengthened security posture by ensuring sensitive configuration data is not logged. - Improved maintainability and predictability of dependencies with explicit, separate installation steps for core components. Technologies/skills demonstrated: - Native build optimization and CI instrumentation, including disk usage monitoring. - Secure logging practices and data minimization. - Linux build system refactoring and dependency management (Thrift/Arrow). - Version-controlled build pipelines and dependency orchestration across multiple repos.

December 2024 monthly summary focusing on key accomplishments across prestodb/presto and oap-project/velox. Highlights include configurability enhancements, test stability improvements, CI/CD modernization, and build hygiene across the codebases. These efforts delivered tangible business value by reducing deployment friction, accelerating feedback loops, and strengthening release reliability.

November 2024 performance summary for Velox and Presto integration work. Delivered robust cross-platform build and deployment capabilities, advanced C++ modernization and safety, and strengthened CI for Linux with Clang, enabling more reliable releases across Linux and macOS. Strengthened native execution robustness in PrestoServer via Velox namespace discipline. Business impact includes fewer platform-specific build failures, accelerated PR/push validation, and improved security posture through static analysis fixes.

October 2024: Delivered cross-platform build parallelism unification for Velox by standardizing and using the NPROC variable across macOS and Linux. Refactored setup scripts to populate NPROC via a shared mechanism and use it to drive parallel make jobs. This work improves build consistency, reduces time-to-build across platforms, and simplifies maintenance.