percona/percona-server-mongodb
Sep 2025 – Dec 2025
4 Months active
Languages Used
C++JavaScript
Technical Skills
API DevelopmentAPI developmentC++C++ developmentC++ programmingDatabase Management
Cedric Sirianni
PROFILE
Cedric Sirianni
Worked on percona/percona-server-mongodb over four months, delivering nine features focused on extensibility, observability, and modularity for MongoDB’s extension and indexing subsystems. Developed new aggregation stages and enhanced the extension API to support host-defined nodes, improving memory management and error handling in C++ and JavaScript. Modularized shared extension code using Bazel, enabling better maintainability and testing. Instrumented server metrics to expose index build durations and failure reasons, supporting real-time monitoring and diagnostics. Prioritized robust API design, security, and operational visibility, with expanded test coverage and code cleanup to reduce maintenance risk and support future development across backend and database layers.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
18Total
Bugs
0
Commits
18
Features
9
Lines of code
3,898
Activity Months4
Your Network
261 peopleWork History
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025: Delivered observability improvements for index builds in Percona Server for MongoDB. Added metrics counting index build failures due to duplicate key errors and manual cancellations, and exposed these metrics in server.status to enable real-time monitoring, troubleshooting, and capacity planning. Change linked to SERVER-113250 via commit 5ae0c8c420e3613f4c28fb43bfaa91cabe833d3f in percona/percona-server-mongodb.
1 Commits • 1 Features
Dec 1, 2025December 2025: Delivered observability improvements for index builds in Percona Server for MongoDB. Added metrics counting index build failures due to duplicate key errors and manual cancellations, and exposed these metrics in server.status to enable real-time monitoring, troubleshooting, and capacity planning. Change linked to SERVER-113250 via commit 5ae0c8c420e3613f4c28fb43bfaa91cabe833d3f in percona/percona-server-mongodb.
December 2025
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025 focused on improving observability for index builds in Percona Server for MongoDB. Delivered instrumentation that adds lastCommittedMillis to the index builds section of server status metrics, enabling better monitoring of the duration of the last committed index build and faster diagnostics for index-build related performance issues.
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025 focused on improving observability for index builds in Percona Server for MongoDB. Delivered instrumentation that adds lastCommittedMillis to the index builds section of server status metrics, enabling better monitoring of the duration of the last committed index build and faster diagnostics for index-build related performance issues.
October 2025
7 Commits • 4 Features
Oct 1, 20252025-10 Monthly Summary: Delivered architecture, extensibility, and observability improvements across the MongoDB-related parts of percona-server-mongodb, with a focus on extensibility, modularity, reliability, and operational visibility. Key features delivered: - MongoDB Aggregation Framework Extensibility: Added host-defined aggregation stages via host::AggregationStageParseNode, extended handling for host and extension-defined nodes, and memory/error handling improvements during node expansion. Commits reflect API enhancements (SERVER-109778) and VariantNode definition updates (SERVER-111972). - Shared extensions API modularization: Introduced a new directory structure and Bazel build targets for shared code in the extensions API to improve modularity, maintainability, and testing (SERVER-112012). - Observability and metrics for indexing and sorting: Implemented conditional logging for merge spills during sorting, indexType logging during validation, and a new metric for unique index key conflicts to improve diagnostics and performance visibility. - Timeseries feature removal: Removed the timeseries bucket compression operation source to simplify operation source enumeration and related error handling. Major impact: - Strengthened extensibility and future-proofing of aggregation workflows with host-driven stages and a more modular extensions API. - Improved observability and diagnostics for indexing, sorting, and validation, enabling faster issue diagnosis and performance tuning. - Reduced maintenance burden and improved testing capabilities through modularized APIs and Bazel targets. Technologies/skills demonstrated: - Bazel-based modularization and build target expansion for shared extensions API. - API design changes for host-extensions and variant handling with memory/error safety considerations. - Instrumentation and logging improvements for operational visibility and performance metrics. - Code cleanup and simplification of operation sources for Timeseries features.
7 Commits • 4 Features
Oct 1, 20252025-10 Monthly Summary: Delivered architecture, extensibility, and observability improvements across the MongoDB-related parts of percona-server-mongodb, with a focus on extensibility, modularity, reliability, and operational visibility. Key features delivered: - MongoDB Aggregation Framework Extensibility: Added host-defined aggregation stages via host::AggregationStageParseNode, extended handling for host and extension-defined nodes, and memory/error handling improvements during node expansion. Commits reflect API enhancements (SERVER-109778) and VariantNode definition updates (SERVER-111972). - Shared extensions API modularization: Introduced a new directory structure and Bazel build targets for shared code in the extensions API to improve modularity, maintainability, and testing (SERVER-112012). - Observability and metrics for indexing and sorting: Implemented conditional logging for merge spills during sorting, indexType logging during validation, and a new metric for unique index key conflicts to improve diagnostics and performance visibility. - Timeseries feature removal: Removed the timeseries bucket compression operation source to simplify operation source enumeration and related error handling. Major impact: - Strengthened extensibility and future-proofing of aggregation workflows with host-driven stages and a more modular extensions API. - Improved observability and diagnostics for indexing, sorting, and validation, enabling faster issue diagnosis and performance tuning. - Reduced maintenance burden and improved testing capabilities through modularized APIs and Bazel targets. Technologies/skills demonstrated: - Bazel-based modularization and build target expansion for shared extensions API. - API design changes for host-extensions and variant handling with memory/error safety considerations. - Instrumentation and logging improvements for operational visibility and performance metrics. - Code cleanup and simplification of operation sources for Timeseries features.
October 2025
September 2025
9 Commits • 3 Features
Sep 1, 2025September 2025: Focused on extensibility, security, and parsing robustness for the MongoDB extension API. Delivered key features that improve extension discovery, control, and usage; expanded test coverage to increase stability; and performed essential maintenance to reduce future risk. Business value realized through easier extension management, safer access controls, and modular API exposure, enabling broader adoption by extension developers and customers. Key outcomes: - Extensibility: Extensions Listing and Management with a new $listExtensions aggregation stage, including per-extension options and authorization controls, backed by expanded tests. -Security and visibility: FTS Module API visibility enhancements by exposing interfaces via module headers to enable broader usage and modularity. -Parsing robustness: New MongoExtensionAggregationStageParseNode to validate and expand aggregation stages in the extension API. -Quality and maintenance: Test enhancements and code cleanup (removal of YAML->BSON TODOs) to strengthen stability for future releases.
September 2025
9 Commits • 3 Features
Sep 1, 2025September 2025: Focused on extensibility, security, and parsing robustness for the MongoDB extension API. Delivered key features that improve extension discovery, control, and usage; expanded test coverage to increase stability; and performed essential maintenance to reduce future risk. Business value realized through easier extension management, safer access controls, and modular API exposure, enabling broader adoption by extension developers and customers. Key outcomes: - Extensibility: Extensions Listing and Management with a new $listExtensions aggregation stage, including per-extension options and authorization controls, backed by expanded tests. -Security and visibility: FTS Module API visibility enhancements by exposing interfaces via module headers to enable broader usage and modularity. -Parsing robustness: New MongoExtensionAggregationStageParseNode to validate and expand aggregation stages in the extension API. -Quality and maintenance: Test enhancements and code cleanup (removal of YAML->BSON TODOs) to strengthen stability for future releases.
Activity
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Quality Metrics
Correctness93.2%
Maintainability83.2%
Architecture89.0%
Performance84.4%
AI Usage26.8%
Skills & Technologies
Programming Languages
C++JavaScript
Technical Skills
API DevelopmentAPI designAPI developmentBazelC++C++ developmentC++ programmingDatabase ManagementJavaScript programmingMongoDBSoftware ArchitectureSoftware architectureUnit TestingUnit testingback end development
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