ydb-platform/ydb
Sep 2025 – Mar 2026
7 Months active
Languages Used
C++ProtoPythonSQLcppprotobufpythonproto
Technical Skills
Backend DevelopmentC++Database InternalsDatabase TestingTestingData Processing
Stanislav Yablonskiy
PROFILE
Stanislav Yablonskiy
Worked on the ydb-platform/ydb repository, delivering features that enhanced storage efficiency, data integrity, and system maintainability. Developed per-column compression settings and integrated compression algorithms into the database schema using C++ and SQL, enabling improved storage density and flexible data management. Refactored core modules such as the interval tree for clearer logic and better performance, and moved header implementations to source files to reduce build dependencies. Strengthened error handling and expanded test coverage with Python, ensuring robust handling of unsupported configurations. Focused on backend development, database internals, and performance optimization, consistently improving reliability and observability across OLAP workloads.
Overall Statistics
Feature vs Bugs
80%Features
Repository Contributions
18Total
Bugs
3
Commits
18
Features
12
Lines of code
7,667
Activity Months7
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Work History
March 2026
2 Commits • 2 Features
Mar 1, 2026March 2026 monthly summary for ydb-platform/ydb: Focused on delivering storage- and performance-oriented features while strengthening data integrity and maintainability. Delivered two major features with clear business value: per-column compression settings and a refactored interval tree. These changes were implemented with attention to reliability and future scalability.
2 Commits • 2 Features
Mar 1, 2026March 2026 monthly summary for ydb-platform/ydb: Focused on delivering storage- and performance-oriented features while strengthening data integrity and maintainability. Delivered two major features with clear business value: per-column compression settings and a refactored interval tree. These changes were implemented with attention to reliability and future scalability.
March 2026
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026: Delivered enhancements to column compression handling in table creation and updates for ydb-platform/ydb, with robust error handling for unsupported compression in row tables and expanded test coverage across compression scenarios. This work reduces deployment risk and supports more reliable storage optimization.
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026: Delivered enhancements to column compression handling in table creation and updates for ydb-platform/ydb, with robust error handling for unsupported compression in row tables and expanded test coverage across compression scenarios. This work reduces deployment risk and supports more reliable storage optimization.
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for developer work focusing on delivering storage efficiency enhancements in the ydb-platform/ydb repository. This month centered on introducing column-level compression settings to the database schema, enabling better data storage density and potential I/O improvements. The work was planned, implemented, and integrated with the existing metadata and DDL flow, with code committed under the feature branch linked to the issue/PR referencing compression (#29523).
1 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for developer work focusing on delivering storage efficiency enhancements in the ydb-platform/ydb repository. This month centered on introducing column-level compression settings to the database schema, enabling better data storage density and potential I/O improvements. The work was planned, implemented, and integrated with the existing metadata and DDL flow, with code committed under the feature branch linked to the issue/PR referencing compression (#29523).
January 2026
December 2025
4 Commits • 3 Features
Dec 1, 2025December 2025: Delivered core platform improvements in ydb-platform/ydb focused on maintainability, data freshness, and observability. Implemented codebase refactors to move header implementations to source, reduced data staleness for Column Shards, and added an in-flight transaction reject probability counter to enhance monitoring and analytics. These changes reduce build dependencies, provide fresher data reads, and improve visibility into transaction behavior, enabling faster iteration and more reliable service delivery.
December 2025
4 Commits • 3 Features
Dec 1, 2025December 2025: Delivered core platform improvements in ydb-platform/ydb focused on maintainability, data freshness, and observability. Implemented codebase refactors to move header implementations to source, reduced data staleness for Column Shards, and added an in-flight transaction reject probability counter to enhance monitoring and analytics. These changes reduce build dependencies, provide fresher data reads, and improve visibility into transaction behavior, enabling faster iteration and more reliable service delivery.
November 2025
2 Commits • 2 Features
Nov 1, 2025In 2025-11, delivered two targeted codebase improvements for ydb-platform/ydb that enhance reliability and maintainability: - Enabled the Column Shard Reject Probability feature by default in feature flags, enabling reject probability functionality for improved data processing and error handling in columnar storage operations (commit 0e72d0f7b4aba973a35cb4e98a1a0aad36b7306a, #28530). - Completed a codebase refactor moving implementations from source.h to source.cpp to improve code organization and the separation of interface and implementation (commit b76d018426c23094bf85b7efc33c1abbe06a74f8, #29268).
2 Commits • 2 Features
Nov 1, 2025In 2025-11, delivered two targeted codebase improvements for ydb-platform/ydb that enhance reliability and maintainability: - Enabled the Column Shard Reject Probability feature by default in feature flags, enabling reject probability functionality for improved data processing and error handling in columnar storage operations (commit 0e72d0f7b4aba973a35cb4e98a1a0aad36b7306a, #28530). - Completed a codebase refactor moving implementations from source.h to source.cpp to improve code organization and the separation of interface and implementation (commit b76d018426c23094bf85b7efc33c1abbe06a74f8, #29268).
November 2025
October 2025
6 Commits • 3 Features
Oct 1, 2025October 2025 monthly performance summary for the ydb platform. Key outcomes focused on delivering reliable data processing, system stability, and dynamic configurability that directly support business resilience and operational efficiency. The month emphasized tackling correctness, preventing regressions, and enabling runtime tuning of critical controls.
October 2025
6 Commits • 3 Features
Oct 1, 2025October 2025 monthly performance summary for the ydb platform. Key outcomes focused on delivering reliable data processing, system stability, and dynamic configurability that directly support business resilience and operational efficiency. The month emphasized tackling correctness, preventing regressions, and enabling runtime tuning of critical controls.
September 2025
2 Commits
Sep 1, 2025September 2025 Monthly Summary for ydb-platform/ydb focusing on reliability and statistics improvements in ColumnShard. Delivered targeted fixes to improve data accuracy, observability, and stability of OLAP workloads, with an emphasis on business value and operational uptime.
2 Commits
Sep 1, 2025September 2025 Monthly Summary for ydb-platform/ydb focusing on reliability and statistics improvements in ColumnShard. Delivered targeted fixes to improve data accuracy, observability, and stability of OLAP workloads, with an emphasis on business value and operational uptime.
September 2025
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Quality Metrics
Correctness90.0%
Maintainability90.0%
Architecture88.4%
Performance81.6%
AI Usage22.2%
Skills & Technologies
Programming Languages
C++ProtoPythonSQLcppprotoprotobufpython
Technical Skills
Algorithm OptimizationBackend DevelopmentC++C++ developmentData ProcessingData StructuresDatabaseDatabase InternalsDatabase SystemsDatabase TestingDistributed SystemsFeature FlaggingKQPOLAPPerformance Optimization
Repositories Contributed To
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