ubicloud/ubicloud
Nov 2024 – Mar 2026
17 Months active
Languages Used
JSONRSpecRubySQLShellYAML
Technical Skills
Backend DevelopmentCloud InfrastructureDatabase MigrationDevOpsEnd-to-End TestingLinux Kernel
Hadi Moshayedi
PROFILE
Hadi Moshayedi
Hadi worked on the ubicloud/ubicloud repository, delivering robust backend infrastructure for cloud VM provisioning, storage, and resource management. He engineered features such as adaptive storage backends, slice-based allocation, and automated migration flows, focusing on reliability and scalability. Using Ruby, SQL, and Shell scripting, Hadi implemented dynamic resource sizing, database migrations, and end-to-end test automation to ensure system integrity across upgrades. His work addressed kernel-level scheduling, storage encryption, and performance tuning, resulting in predictable provisioning and safer data persistence. The depth of his contributions is reflected in careful schema evolution, cross-component integration, and a strong emphasis on test coverage.
Overall Statistics
Feature vs Bugs
68%Features
Repository Contributions
88Total
Bugs
14
Commits
88
Features
30
Lines of code
3,635
Activity Months17
Your Network
35 peopleShared Repositories
25
Burak YucesoyMember
shikharbhardwajMember
Eren BasakMember
ayakut16Member
Amogh-BharadwajMember
Andrey ChudnovskiyMember
Benjamin SatzgerMember
Jeremy EvansMember
Daniel FarinaMember
Work History
March 2026
5 Commits • 3 Features
Mar 1, 2026March 2026 focused on strengthening migration reliability for SPDK to UBIBLK, memory allocation predictability for Premium-30 VMs, and test accuracy through real strand updates. Delivered end-to-end cleanup, robust stop/start handling, and post-migration VM activation, alongside memory safety improvements and higher-fidelity test assertions. These changes reduce leak risks, enable tighter capacity planning, and improve overall confidence in CI and production readiness.
5 Commits • 3 Features
Mar 1, 2026March 2026 focused on strengthening migration reliability for SPDK to UBIBLK, memory allocation predictability for Premium-30 VMs, and test accuracy through real strand updates. Delivered end-to-end cleanup, robust stop/start handling, and post-migration VM activation, alongside memory safety improvements and higher-fidelity test assertions. These changes reduce leak risks, enable tighter capacity planning, and improve overall confidence in CI and production readiness.
March 2026
February 2026
5 Commits • 2 Features
Feb 1, 2026February 2026 (ubicloud/ubicloud) delivered stability, security, and modernization of Ubiblk-backed storage paths and VM boot flows. Key work included a v2/v0.4.0 era upgrade path across Clover and Rhizome, aligning tests and configurations to Ubiblk 0.x releases, and removing legacy features that added risk.
February 2026
5 Commits • 2 Features
Feb 1, 2026February 2026 (ubicloud/ubicloud) delivered stability, security, and modernization of Ubiblk-backed storage paths and VM boot flows. Key work included a v2/v0.4.0 era upgrade path across Clover and Rhizome, aligning tests and configurations to Ubiblk 0.x releases, and removing legacy features that added risk.
January 2026
2 Commits • 1 Features
Jan 1, 2026January 2026: Focused on delivering a default storage backend and improving VM migration reliability in ubicloud/ubicloud to accelerate provisioning and reduce operational risk. Implemented production-tested defaults and expanded test coverage to prevent regressions.
2 Commits • 1 Features
Jan 1, 2026January 2026: Focused on delivering a default storage backend and improving VM migration reliability in ubicloud/ubicloud to accelerate provisioning and reduce operational risk. Implemented production-tested defaults and expanded test coverage to prevent regressions.
January 2026
December 2025
8 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for ubicloud/ubicloud focusing on delivering robust Ubiblk integration, observability, and reliability improvements that directly enhance disk migration safety and data persistence across VM lifecycles.
December 2025
8 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for ubicloud/ubicloud focusing on delivering robust Ubiblk integration, observability, and reliability improvements that directly enhance disk migration safety and data persistence across VM lifecycles.
November 2025
3 Commits • 1 Features
Nov 1, 2025Month: 2025-11. Focused on stabilizing hosting infrastructure and improving remote access reliability for ubicloud. Key work centered on kernel-level cpuset partition fixes and SSHD pre-auth resource management to reduce host unavailability and improve provisioning speed. Key outcomes: more stable host scheduling, fewer production incidents related to kworker misallocation, and more reliable pre-auth connectivity during provisioning.
3 Commits • 1 Features
Nov 1, 2025Month: 2025-11. Focused on stabilizing hosting infrastructure and improving remote access reliability for ubicloud. Key work centered on kernel-level cpuset partition fixes and SSHD pre-auth resource management to reduce host unavailability and improve provisioning speed. Key outcomes: more stable host scheduling, fewer production incidents related to kworker misallocation, and more reliable pre-auth connectivity during provisioning.
November 2025
October 2025
2 Commits
Oct 1, 2025October 2025 monthly summary for ubicloud/ubicloud: Focused on stabilizing Ubiblk v0.2.1 integration with the storage backend and improving data integrity. Delivered critical fixes to data fetching and data serving, and ensured correct behavior when copy_on_read is false. Implemented safeguards to prevent data overwrite during repeated stripe fetches. Two commits enabled cross-component support (Rhizome and Clover) for Ubiblk v0.2.1.
October 2025
2 Commits
Oct 1, 2025October 2025 monthly summary for ubicloud/ubicloud: Focused on stabilizing Ubiblk v0.2.1 integration with the storage backend and improving data integrity. Delivered critical fixes to data fetching and data serving, and ensured correct behavior when copy_on_read is false. Implemented safeguards to prevent data overwrite during repeated stripe fetches. Two commits enabled cross-component support (Rhizome and Clover) for Ubiblk v0.2.1.
September 2025
6 Commits • 2 Features
Sep 1, 2025Month: 2025-09. Focused on delivering Ubiblk enhancements in ubicloud/ubicloud to improve performance, reliability, and upgrade readiness. Key features: Ubiblk VRing workers configuration with per-disk workers, migrations and data integrity constraints/backfill; Ubiblk v0.2.0 upgrade across configuration with removal of v0.1-7 checksums. Completed data migrations/backfill and constraint additions to maintain consistency for existing volumes. Impact: improved PostgreSQL performance for Ubiblk-backed volumes, better resource utilization, and a cleaner upgrade path; risk reduced by removing legacy checksums. Skills demonstrated: database schema evolution, data migrations/backfill strategies, release engineering, and performance-focused optimization.
6 Commits • 2 Features
Sep 1, 2025Month: 2025-09. Focused on delivering Ubiblk enhancements in ubicloud/ubicloud to improve performance, reliability, and upgrade readiness. Key features: Ubiblk VRing workers configuration with per-disk workers, migrations and data integrity constraints/backfill; Ubiblk v0.2.0 upgrade across configuration with removal of v0.1-7 checksums. Completed data migrations/backfill and constraint additions to maintain consistency for existing volumes. Impact: improved PostgreSQL performance for Ubiblk-backed volumes, better resource utilization, and a cleaner upgrade path; risk reduced by removing legacy checksums. Skills demonstrated: database schema evolution, data migrations/backfill strategies, release engineering, and performance-focused optimization.
September 2025
August 2025
5 Commits • 2 Features
Aug 1, 2025August 2025 monthly summary for ubicloud/ubicloud: Delivered Ubiblk v0.2.0 readiness across key components, implemented automatic write-through mode optimization, and fixed backward compatibility for legacy Base64 data in StorageKeyEncryption.read_encrypted_dek. Expanded E2E test coverage and coordinated changes across Rhizome, Clover, and the test workflow.
August 2025
5 Commits • 2 Features
Aug 1, 2025August 2025 monthly summary for ubicloud/ubicloud: Delivered Ubiblk v0.2.0 readiness across key components, implemented automatic write-through mode optimization, and fixed backward compatibility for legacy Base64 data in StorageKeyEncryption.read_encrypted_dek. Expanded E2E test coverage and coordinated changes across Rhizome, Clover, and the test workflow.
July 2025
5 Commits • 1 Features
Jul 1, 2025During July 2025 for ubicloud/ubicloud, delivered reliability and backend-management improvements focused on storage and virtualization workflows. Key features and fixes include Ubiblk v0.1-7 startup race fix and compatibility updates across the vhost backend and Rhizome host, ensuring proper vring enablement and synchronized startup behavior. Implemented daemon cleanup after VhostBlockBackend initialization to prevent issues during subsequent destroy/reinstall cycles, with the test suite updated accordingly. Clarified VmHostSlice.enabled semantics to reflect only destruction scheduling, reducing the risk of orphaned slices after VM deletions. Enabled removal of the last SPDK installation when Ubiblk is available, with validation to ensure no other block backends remain before removal, improving storage backend flexibility. These changes reduce startup failures, stabilize lifecycle operations, and simplify backend maintenance, delivering business value by hardening core storage and virtualization workflows and enabling cleaner upgrades.
5 Commits • 1 Features
Jul 1, 2025During July 2025 for ubicloud/ubicloud, delivered reliability and backend-management improvements focused on storage and virtualization workflows. Key features and fixes include Ubiblk v0.1-7 startup race fix and compatibility updates across the vhost backend and Rhizome host, ensuring proper vring enablement and synchronized startup behavior. Implemented daemon cleanup after VhostBlockBackend initialization to prevent issues during subsequent destroy/reinstall cycles, with the test suite updated accordingly. Clarified VmHostSlice.enabled semantics to reflect only destruction scheduling, reducing the risk of orphaned slices after VM deletions. Enabled removal of the last SPDK installation when Ubiblk is available, with validation to ensure no other block backends remain before removal, improving storage backend flexibility. These changes reduce startup failures, stabilize lifecycle operations, and simplify backend maintenance, delivering business value by hardening core storage and virtualization workflows and enabling cleaner upgrades.
July 2025
June 2025
12 Commits • 3 Features
Jun 1, 2025June 2025 performance summary for ubicloud/ubicloud highlighting key feature delivery, major bug fixes, and overall impact. Delivered multi-backend storage enhancements with Ubiblk integration, core VhostBlockBackend lifecycle and DB migrations, and QoS simplifications aligned with cgroup v2. Also resolved an E2E stability issue by correcting donation behavior to operate on the actual strand.child datasets.
June 2025
12 Commits • 3 Features
Jun 1, 2025June 2025 performance summary for ubicloud/ubicloud highlighting key feature delivery, major bug fixes, and overall impact. Delivered multi-backend storage enhancements with Ubiblk integration, core VhostBlockBackend lifecycle and DB migrations, and QoS simplifications aligned with cgroup v2. Also resolved an E2E stability issue by correcting donation behavior to operate on the actual strand.child datasets.
May 2025
2 Commits • 1 Features
May 1, 2025Month: 2025-05 — ubicloud/ubicloud delivered slice-based allocation default for Ubuntu 24.04 hosts, including OS capability check os_supports_slices? and vm_host update accepts_slices to streamline provisioning. Obsolete allow_slices testing code removed since the slice-based allocator is now the default. No major bugs fixed this month; focus was on feature enablement and CI cleanup. Business impact: faster, more predictable provisioning for new Ubuntu 24.04 deployments, reduced CI maintenance, and a cleaner test surface. Technologies/skills demonstrated: provisioning orchestration, OS capability checks, allocator integration, CI/test cleanup, and version-aware defaults.
2 Commits • 1 Features
May 1, 2025Month: 2025-05 — ubicloud/ubicloud delivered slice-based allocation default for Ubuntu 24.04 hosts, including OS capability check os_supports_slices? and vm_host update accepts_slices to streamline provisioning. Obsolete allow_slices testing code removed since the slice-based allocator is now the default. No major bugs fixed this month; focus was on feature enablement and CI cleanup. Business impact: faster, more predictable provisioning for new Ubuntu 24.04 deployments, reduced CI maintenance, and a cleaner test surface. Technologies/skills demonstrated: provisioning orchestration, OS capability checks, allocator integration, CI/test cleanup, and version-aware defaults.
May 2025
April 2025
3 Commits • 1 Features
Apr 1, 2025Concise monthly summary for 2025-04: Delivered high-impact back-end improvements focused on billing accuracy and resource efficiency. Restored missing burstable billing rates for US Leaseweb (WDC02) to ensure correct invoicing, and implemented adaptive SPDK resource allocation that sizes buffers and hugepages based on host CPU capacity, aligning resources to the number of SPDK CPUs and preventing allocation failures. These efforts improved billing integrity, system stability, and scalability across heterogeneous deployments, demonstrating strong low-level engineering and capacity-aware design.
April 2025
3 Commits • 1 Features
Apr 1, 2025Concise monthly summary for 2025-04: Delivered high-impact back-end improvements focused on billing accuracy and resource efficiency. Restored missing burstable billing rates for US Leaseweb (WDC02) to ensure correct invoicing, and implemented adaptive SPDK resource allocation that sizes buffers and hugepages based on host CPU capacity, aligning resources to the number of SPDK CPUs and preventing allocation failures. These efforts improved billing integrity, system stability, and scalability across heterogeneous deployments, demonstrating strong low-level engineering and capacity-aware design.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for ubicloud/ubicloud focused on improving VM slice startup reliability after host reboot and strengthening end-to-end (E2E) testing. Delivered a dedicated feature to ensure VM slices initialize post-reboot and expanded E2E coverage by integrating host reboot tests with slice testing. CI pipelines were updated to run encrypted VM scenarios with slice creation to verify host reboots with slices in the E2E environment. These changes reduce reboot-related failures, increase production confidence in slice-based VM orchestration, and extend coverage for critical reboot workflows.
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for ubicloud/ubicloud focused on improving VM slice startup reliability after host reboot and strengthening end-to-end (E2E) testing. Delivered a dedicated feature to ensure VM slices initialize post-reboot and expanded E2E coverage by integrating host reboot tests with slice testing. CI pipelines were updated to run encrypted VM scenarios with slice creation to verify host reboots with slices in the E2E environment. These changes reduce reboot-related failures, increase production confidence in slice-based VM orchestration, and extend coverage for critical reboot workflows.
March 2025
February 2025
9 Commits • 4 Features
Feb 1, 2025February 2025 in ubicloud/ubicloud delivered focused SPDK stability and capacity improvements, enhanced logging for production debugging, a deadline-based VM unavailability mechanism, and strengthened end-to-end test reliability. These efforts improved IO stability, increased capacity for future growth, and reduced incident response time through clearer instrumentation and more robust automation.
February 2025
9 Commits • 4 Features
Feb 1, 2025February 2025 in ubicloud/ubicloud delivered focused SPDK stability and capacity improvements, enhanced logging for production debugging, a deadline-based VM unavailability mechanism, and strengthened end-to-end test reliability. These efforts improved IO stability, increased capacity for future growth, and reduced incident response time through clearer instrumentation and more robust automation.
January 2025
3 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for ubicloud/ubicloud focusing on feature delivery and process improvements that increase VM provisioning efficiency and CI reliability. Delivered groundwork for VM Host CPU management and CPU allocation to VM slices, plus a streamlined testing workflow for pre-configured hosts.
3 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for ubicloud/ubicloud focusing on feature delivery and process improvements that increase VM provisioning efficiency and CI reliability. Delivered groundwork for VM Host CPU management and CPU allocation to VM slices, plus a streamlined testing workflow for pre-configured hosts.
January 2025
December 2024
5 Commits • 2 Features
Dec 1, 2024December 2024: Ubicloud/ubicloud delivered meaningful resource governance and reliability improvements across VM provisioning, test automation, and release hygiene. Implemented VM IO limits to enforce per-VM IO quotas, expanded end-to-end testing for SliceSetup, and updated the OS release to resolve image download failures. A temporary safety fix relaxed a brittle vCPU consistency check to prevent production outages while addressing the underlying issue. These changes reduce runtime errors, improve user-facing stability, and strengthen CI coverage for faster, safer deployments.
December 2024
5 Commits • 2 Features
Dec 1, 2024December 2024: Ubicloud/ubicloud delivered meaningful resource governance and reliability improvements across VM provisioning, test automation, and release hygiene. Implemented VM IO limits to enforce per-VM IO quotas, expanded end-to-end testing for SliceSetup, and updated the OS release to resolve image download failures. A temporary safety fix relaxed a brittle vCPU consistency check to prevent production outages while addressing the underlying issue. These changes reduce runtime errors, improve user-facing stability, and strengthen CI coverage for faster, safer deployments.
November 2024
11 Commits • 2 Features
Nov 1, 2024November 2024 delivered significant stability and performance improvements in ubicloud/ubicloud. Key features include storage I/O rate limiting (QoS) for VM storage with SPDK integration and end-to-end validation; OS-version aware VmHost with OS-specific SPDK binaries and Ubuntu 24.04 support; and a robust ARM64 CPU die detection fix. In addition, test infrastructure enhancements reduced flakiness and improved coverage by widening UBID time windows and adding purge verification after VM destruction. Business impact: predictable tenant I/O performance, smoother OS upgrade paths, and faster, more reliable CI feedback for future releases.
11 Commits • 2 Features
Nov 1, 2024November 2024 delivered significant stability and performance improvements in ubicloud/ubicloud. Key features include storage I/O rate limiting (QoS) for VM storage with SPDK integration and end-to-end validation; OS-version aware VmHost with OS-specific SPDK binaries and Ubuntu 24.04 support; and a robust ARM64 CPU die detection fix. In addition, test infrastructure enhancements reduced flakiness and improved coverage by widening UBID time windows and adding purge verification after VM destruction. Business impact: predictable tenant I/O performance, smoother OS upgrade paths, and faster, more reliable CI feedback for future releases.
November 2024
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Quality Metrics
Correctness92.2%
Maintainability88.4%
Architecture88.2%
Performance84.2%
AI Usage21.2%
Skills & Technologies
Programming Languages
JSONRSpecRubySQLShellYAML
Technical Skills
Backend DevelopmentCI/CDCloud InfrastructureCode QualityCode RefactoringConfiguration ManagementCryptographyData MigrationDatabase ManagementDatabase MigrationDatabase OptimizationDependency ManagementDevOpsEnd-to-End TestingInfrastructure Management
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline