percona/percona-server-mongodb
Dec 2025 – Mar 2026
4 Months active
Languages Used
C++JavaScript
Technical Skills
C++C++ developmentbackend developmentcode documentationdatabase managementsoftware maintenance
marcobizzarri-mdb
PROFILE
Marcobizzarri-mdb
Marco Bizzarri contributed to the percona/percona-server-mongodb repository by delivering features and maintenance focused on code quality, upgrade reliability, and operational safety. He refactored shard-related logic in C++ to improve maintainability, modularized upgrade and downgrade workflows through a feature compatibility version (FCV) step plugin, and enhanced runtime management of FCV without requiring server restarts. Marco also implemented governance for code ownership, enforced stricter validation in JavaScript commands, and improved database state upgrade tests. His work addressed both backend development and error handling, resulting in a more robust, maintainable codebase that reduces operational risk and streamlines future development efforts.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
12Total
Bugs
3
Commits
12
Features
6
Lines of code
2,033
Activity Months4
Your Network
586 peopleSame Organization
@mongodb.com339
Shared Repositories
247
Work History
March 2026
2 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for Percona Server for MongoDB: Delivered FCV step plugin migration to modularize upgrade/downgrade logic and implemented a guard against waiting on DDL coordinators when the system is paused. Added tests to validate behavior and prevent invalid operations during maintenance windows. These changes improve maintainability, reliability, and risk management in the upgrade path.
2 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for Percona Server for MongoDB: Delivered FCV step plugin migration to modularize upgrade/downgrade logic and implemented a guard against waiting on DDL coordinators when the system is paused. Added tests to validate behavior and prevent invalid operations during maintenance windows. These changes improve maintainability, reliability, and risk management in the upgrade path.
March 2026
February 2026
5 Commits • 1 Features
Feb 1, 2026February 2026: Delivered runtime FCV management in percona-server-mongodb, enabling the default feature compatibility version (FCV) to be set at runtime without server restart and improving robustness of FCV handling and config server checks. Fixed critical observability and upgrade reliability issues: corrected vector clock recovery logging to ensure accurate diagnostics and improved the reliability of the config.shard state attribute upgrade test by removing pre-upgrade document-count validation and focusing on post-upgrade state. These changes enhance deployment flexibility, observability, and upgrade confidence, reducing operational risk and downtime.
February 2026
5 Commits • 1 Features
Feb 1, 2026February 2026: Delivered runtime FCV management in percona-server-mongodb, enabling the default feature compatibility version (FCV) to be set at runtime without server restart and improving robustness of FCV handling and config server checks. Fixed critical observability and upgrade reliability issues: corrected vector clock recovery logging to ensure accurate diagnostics and improved the reliability of the config.shard state attribute upgrade test by removing pre-upgrade document-count validation and focusing on post-upgrade state. These changes enhance deployment flexibility, observability, and upgrade confidence, reducing operational risk and downtime.
January 2026
3 Commits • 3 Features
Jan 1, 2026January 2026 monthly summary for percona/percona-server-mongodb focusing on governance, validation, and config cleanup to improve ownership clarity, upgrade/downgrade safety, and cross-shard consistency.
3 Commits • 3 Features
Jan 1, 2026January 2026 monthly summary for percona/percona-server-mongodb focusing on governance, validation, and config cleanup to improve ownership clarity, upgrade/downgrade safety, and cross-shard consistency.
January 2026
December 2025
2 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for percona/percona-server-mongodb: Focused on code quality and maintainability improvements through targeted refactoring and cleanup, enabling faster future feature work and reduced risk of regressions in shard-related code. Delivered a deduplication refactor of makeUnshardedCollectionsOnSpecificShardAggregation to improve code organization and reduce redundancy, and cleaned up typos in comments to enhance clarity across related functionality. All changes are tracked via dedicated issues and commits, aligning with engineering standards and long-term maintainability.
December 2025
2 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for percona/percona-server-mongodb: Focused on code quality and maintainability improvements through targeted refactoring and cleanup, enabling faster future feature work and reduced risk of regressions in shard-related code. Delivered a deduplication refactor of makeUnshardedCollectionsOnSpecificShardAggregation to improve code organization and reduce redundancy, and cleaned up typos in comments to enhance clarity across related functionality. All changes are tracked via dedicated issues and commits, aligning with engineering standards and long-term maintainability.
Activity
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Quality Metrics
Correctness98.4%
Maintainability88.4%
Architecture88.4%
Performance90.0%
AI Usage21.6%
Skills & Technologies
Programming Languages
C++JavaScript
Technical Skills
C++C++ developmentError HandlingJavaScriptJavaScript testingMongoDBUnit Testingbackend developmentcode documentationcode ownership managementcommand implementationdatabase managementshardingsoftware maintenancetesting
Repositories Contributed To
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