trinodb/trino
Apr 2026 – May 2026
2 Months active
Languages Used
JavaMarkdown
Technical Skills
Javabackend developmentconcurrent programmingdata processingdatabase managementfile management
Michael DeRoy
PROFILE
Michael Deroy
Worked on the trinodb/trino repository to enhance the Iceberg plugin by implementing orphan file cleanup and manifest optimization features using Java and backend development skills. Developed a procedure to identify and remove orphan files, improving data hygiene and ensuring only valid data is retained. Introduced a manifest optimization class that clusters manifests by partitioning fields, which accelerates read performance for Iceberg tables. Improved observability by adding metrics for cleanup operations and addressed a storage inefficiency by preventing the creation of empty statistics files. Focused on data processing, database management, and testing to deliver reliable, maintainable improvements for Iceberg-backed workloads.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
4Total
Bugs
1
Commits
4
Features
2
Lines of code
992
Activity Months2
Your Network
231 peopleWork History
May 2026
2 Commits • 1 Features
May 1, 2026Month: 2026-05 — Performance and reliability focus for trinodb/trino. Delivered observability improvements for cleanup operations and fixed a storage inefficiency in the Iceberg plugin optimization by avoiding empty statistics files. These efforts improve data hygiene, reduce unnecessary IO, and provide clearer metrics for ongoing optimization.
2 Commits • 1 Features
May 1, 2026Month: 2026-05 — Performance and reliability focus for trinodb/trino. Delivered observability improvements for cleanup operations and fixed a storage inefficiency in the Iceberg plugin optimization by avoiding empty statistics files. These efforts improve data hygiene, reduce unnecessary IO, and provide clearer metrics for ongoing optimization.
May 2026
April 2026
2 Commits • 1 Features
Apr 1, 2026April 2026: Key features delivered for trinodb/trino focusing on Iceberg Plugin Improvements—Orphan File Cleanup and Manifest Optimization. Implemented a new cleanup procedure to identify and delete orphan files, ensuring only valid data is retained. Added a manifest optimization class to cluster manifests by partitioning fields, speeding up read performance for Iceberg table management. This work is supported by two commits that refactor core logic: 3f216df3b2d002d052d791774c4a8a8815cc2bd2 (Extract orphan file removal logic) and 8cb829fd8477a2f1f18a9d9d6c9ca9370993e1b7 (Extract optimize manifests logic).
April 2026
2 Commits • 1 Features
Apr 1, 2026April 2026: Key features delivered for trinodb/trino focusing on Iceberg Plugin Improvements—Orphan File Cleanup and Manifest Optimization. Implemented a new cleanup procedure to identify and delete orphan files, ensuring only valid data is retained. Added a manifest optimization class to cluster manifests by partitioning fields, speeding up read performance for Iceberg table management. This work is supported by two commits that refactor core logic: 3f216df3b2d002d052d791774c4a8a8815cc2bd2 (Extract orphan file removal logic) and 8cb829fd8477a2f1f18a9d9d6c9ca9370993e1b7 (Extract optimize manifests logic).
Activity
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Quality Metrics
Correctness100.0%
Maintainability80.0%
Architecture90.0%
Performance85.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
JavaMarkdown
Technical Skills
Javabackend developmentconcurrent programmingdata optimizationdata processingdatabase managementfile managementtesting
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