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David Cheng

PROFILE

David Cheng

Worked on storage reliability and security features across the longhorn/longhorn-manager and longhorn/longhorn-instance-manager repositories, focusing on Go and Kubernetes for backend development. Delivered on-demand snapshot checksum calculation to enhance data integrity and improved volume expansion logic to prevent errors in faulted states. Addressed replica scheduling by correcting disk-level storage allocation, and accelerated replica rebuilds with a fastSync parameter. Enhanced snapshot clone status handling and introduced environment-aware upgrade checks. Integrated encryption improvements by updating crypto library usage and adding configurable security parameters for encrypted volumes. The work reduced downtime risk, improved operational robustness, and strengthened security for multi-environment deployments.

Overall Statistics

Feature vs Bugs

57%Features

Repository Contributions

10Total
Bugs
3
Commits
10
Features
4
Lines of code
3,278
Activity Months2

Work History

March 2026

7 Commits • 3 Features

Mar 1, 2026

March 2026 monthly summary focusing on key features delivered, major bugs fixed, and overall impact across longhorn-instance-manager and longhorn-manager. Key outcomes include accelerated replica rebuild workflows, more robust snapshot clone status handling, environment-aware upgrade checks, and enhanced encrypted volume security through crypto library integration. The work reduced downtime risk, improved reliability, and strengthened security posture for multi-environment deployments.

February 2026

3 Commits • 1 Features

Feb 1, 2026

February 2026: Delivered on-demand snapshot checksum calculation for volumes to strengthen data integrity and snapshot management. Fixed critical reliability issues in volume expansion and replica scheduling, boosting robustness, storage efficiency, and operational reliability. Demonstrated solid Go-based storage controller and scheduler engineering, with clear business impact on data safety and capacity planning.

Activity

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Quality Metrics

Correctness90.0%
Maintainability84.0%
Architecture86.0%
Performance84.0%
AI Usage30.0%

Skills & Technologies

Programming Languages

Go

Technical Skills

API developmentGoGo programmingKubernetesback end developmentbackend developmentdependency managementencryptiongRPC

Repositories Contributed To

2 repos

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

longhorn/longhorn-manager

Feb 2026 Mar 2026
2 Months active

Languages Used

Go

Technical Skills

GoKubernetesbackend developmentAPI developmentGo programmingback end development

longhorn/longhorn-instance-manager

Mar 2026 Mar 2026
1 Month active

Languages Used

Go

Technical Skills

Gobackend developmentgRPC