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Daniil Cherednik

PROFILE

Daniil Cherednik

Over nine months, contributed to ydb-platform/ydb by engineering high-performance networking and distributed systems features, with a focus on RDMA interconnects, memory management, and cross-platform stability. Leveraging C++, Go, and Bash, delivered deterministic query routing, robust RDMA handshake and memory pooling, and kernel-level liveness checks to improve reliability and throughput. Enhanced CI/CD pipelines and build systems for faster feedback and reduced deployment risk, while refactoring code for modularity and maintainability. Addressed platform-specific issues for Linux, Windows, and macOS, and improved diagnostics, tracing, and test coverage. The work emphasized scalable architecture, efficient resource usage, and resilient cloud-native deployments.

Overall Statistics

Feature vs Bugs

79%Features

Repository Contributions

72Total
Bugs
6
Commits
72
Features
22
Lines of code
12,774
Activity Months9

Work History

March 2026

2 Commits • 1 Features

Mar 1, 2026

In March 2026, contributed targeted reliability and build-stability improvements to the ydb-platform/ydb interconnect path, delivering concrete business value through improved availability and smoother deployments. The work focused on kernel-level liveness verification, payload handling, and build hygiene to reduce failures and support future scaling.

February 2026

7 Commits • 2 Features

Feb 1, 2026

February 2026 – Delivered stability, performance, and maintainability improvements for ydb-platform/ydb across RDMA, DNS, Schemeshard, and codebase simplifications. Key work includes RDMA watchdog stabilization and reconnection logic, ARM-aware memory copy optimizations, DNS resolver reliability in dynamic environments, a crash fix for Schemeshard path moves with regression tests, and Nameservice refactor to remove interconnect/address dependencies. These changes reduce runtime fragility in cloud deployments, enhance throughput, and simplify future maintenance.

January 2026

6 Commits • 4 Features

Jan 1, 2026

January 2026 (ydb-platform/ydb): Implemented Memory Pool Chunk Reclamation Improvements (cross-slot reuse, increased allocation limit to 32MB, enhanced thread-safety), introduced RDMA Session Handshake Reliability Watchdog, enabled splitting RDMA credentials across IC packets for large events, fixed Windows 64-bit type for RDMA memory management, and refactored Http Proxy inclusion to a header. These changes reduce memory fragmentation and stalls, improve handshake reliability and build stability, and enhance cross-platform correctness, delivering measurable business value in performance, reliability, and maintainability.

December 2025

9 Commits • 5 Features

Dec 1, 2025

2025-12 Monthly Summary — ydb-platform/ydb: Delivered RDMA-centric stability and capability improvements with a focus on cross-platform builds, API flexibility, memory management, and test coverage. These changes reduce release risk, improve runtime stability on macOS/Windows, enable scalable memory usage, and strengthen QA.

November 2025

19 Commits • 4 Features

Nov 1, 2025

Month: 2025-11. Focused on delivering robust RDMA interconnect capabilities in ydb-platform/ydb, advancing tracing/diagnostics, and improving performance and maintainability. Key outcomes include feature delivery for RDMA interconnect with handshake, MTU negotiation, memory allocation, DS proxy RDMA, and platform fallbacks; integration of RDMA configuration into YDB config; non-RDMA performance improvements and extensive logging/diagnostics enhancements. Also addressed stability with allocation paths and testability when ibverbs is absent, and refined tracing and build maintenance for faster delivery of business value.

October 2025

18 Commits • 2 Features

Oct 1, 2025

Month: 2025-10 — Delivered foundational RDMA interconnect and memory management capabilities, advanced testing/CI improvements for RDMA work, and cross-platform build readiness. This mix of core feature work and stability investments is aimed at enabling high-performance data paths, reducing deployment risk, and accelerating future RDMA enhancements across platforms.

September 2025

1 Commits

Sep 1, 2025

September 2025 monthly summary for ydb-platform/ydb: Focused on CI reliability and test stability. Delivered a targeted fix to stabilize RDMA unit tests on Linux when Memory Sanitizer (MSAN) is enabled by conditionally skipping the tests, addressing a blocker where verbs.so lacks MSAN support and caused test runs to fail. This change enables CI to progress reliably and provides faster feedback to developers. The work is traceable to commit cc04733e3e2a95a26d8f5db557422dde1498c03f.

July 2025

7 Commits • 2 Features

Jul 1, 2025

July 2025 — ydb-platform/ydb: Deliverables focused on improving CI reliability for high-performance networking and accelerating developer feedback through build-time optimizations. RDMA CI and testing enhancements now validate interconnect functionality with soft RoCE support, ibdrv presence checks, and enabled interconnect RDMA tests. In parallel, header dependency cleanup reduces compile times by removing unnecessary ActorSystem headers, moving implementations to source files, and tightening test configuration. Linux-specific ibv test compilation was ensured for cross-platform stability.

November 2024

3 Commits • 2 Features

Nov 1, 2024

Month: 2024-11 — Focused delivery of targeted query routing and shard information capabilities in ydb-go-sdk, improving performance, reliability, and observability for multi-node deployments. Emphasized business value through deterministic routing, reduced cross-node latency, and enhanced shard-awareness for descriptive operations.

Activity

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Quality Metrics

Correctness89.2%
Maintainability86.0%
Architecture85.2%
Performance83.6%
AI Usage22.0%

Skills & Technologies

Programming Languages

BashCC++GoHCLMakeMarkdownShellYAMLbash

Technical Skills

API DesignAPI DevelopmentActor ModelBuild System ConfigurationBuild System OptimizationBuild SystemsC++C++ DevelopmentC++ developmentC++ programmingCI/CDCode OrganizationCode RefactoringConcurrencyConnection Pooling

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

ydb-platform/ydb

Jul 2025 Mar 2026
8 Months active

Languages Used

C++HCLMakeShellYAMLBashCMarkdown

Technical Skills

Build System ConfigurationBuild System OptimizationBuild SystemsC++C++ DevelopmentCI/CD

ydb-platform/ydb-go-sdk

Nov 2024 Nov 2024
1 Month active

Languages Used

GoMarkdown

Technical Skills

API DesignConnection PoolingContext ManagementDependency ManagementDocumentationGo SDK Development