March 2026 monthly summary for ydb-platform/nbs: Implemented a reliability fix for Session ID Validation Correctness by switching validation to empty() to properly handle empty/missing session IDs. This non-user-facing change stabilizes session management in Filestore arcadia sync. Demonstrated strong code-quality discipline and collaboration, with 1 commit (2663c59d26705a8150fd57121937d4234102ccc0) and co-authored work with Yudov Maksim.

February 2026 performance summary for ydb-platform: Delivered three storage-focused features, fixed a critical Arcadia synchronization bug, expanded testing and documentation, and strengthened data integrity and system availability across NBS and YDB. The work improved reliability under load, facilitated safer data restoration, and enhanced cross-repo collaboration.

January 2026 monthly delivery highlights: reliability and scalability improvements across NBS platforms. Key work includes the Mirror Disk Checkrange Utility with a new mirror-disk checkrange actor, expanded tests, and simplified replica handling to improve reliability and testing coverage; the Block Range Management System for NBS core libraries to optimize cloud storage range handling; and the new Load Testing Actor for NBS2 to model configurable read workloads for performance validation and capacity planning. These contributions improve operational stability, testing rigor, and scalability, delivering tangible business value for cloud storage operations.

December 2025 monthly summary for ydb-platform/nbs: Delivered a major CheckRange enhancement that always calculates checksums on block reads, removed the calculate_checksums option, and completed a multi-part refactor for ydb-based disks. The work included test consolidation, improved logging, and a simplified actor structure, resulting in stronger data integrity, easier maintenance, and a clearer path for supporting additional disk backends.

November 2025 monthly summary for ydb-platform/nbs: Delivered two key initiatives to improve observability, reliability, and code maintainability around mirror disks and protobuf interfaces. Implemented a new disk agent metric for mirrors, extended logging to support mirror disks, and removed unused protobuf messages to simplify the codebase, improving operational visibility and long-term maintainability. These changes support better resource allocation, proactive monitoring, and faster onboarding for future metrics while reducing technical debt.