eBay/HomeStore
Oct 2024 – Aug 2025
9 Months active
Languages Used
C++Python
Technical Skills
C++ConanC++ DevelopmentDistributed SystemsLog ReplicationRaft Consensus
Jie Yao
PROFILE
Jie Yao
Jyao worked on the eBay/HomeStore repository, building and enhancing distributed storage features with a focus on reliability, observability, and maintainability. Over nine months, Jyao delivered APIs for chunk sizing and usage analytics, improved Raft-based replication with granular event handling, and implemented robust error signaling for disk space and allocation failures. Using C++ and Python, Jyao addressed concurrency issues in the block allocator, introduced graceful shutdown frameworks, and optimized log replication and lifecycle management. The work demonstrated depth in system programming and distributed systems, resulting in safer maintenance, clearer diagnostics, and more resilient storage operations under dynamic and high-load conditions.
Overall Statistics
Feature vs Bugs
64%Features
Repository Contributions
19Total
Bugs
5
Commits
19
Features
9
Lines of code
1,966
Activity Months9
Your Network
31 people
Work History
August 2025
2 Commits • 1 Features
Aug 1, 2025Month: 2025-08 — Focused on reliability improvements and configurable replication behavior in eBay/HomeStore to drive stability and business value. Key changes centered on allocation signaling accuracy and granular replication control, enabling better resource utilization and targeted data push to followers. The work aligns with performance and reliability goals, and establishes groundwork for more maintainable replication policies. Impact highlights include corrected error signaling for allocation failures, which reduces misinterpretation of resource state, and a new replication control flag that enables smarter data synchronization across raft followers.
2 Commits • 1 Features
Aug 1, 2025Month: 2025-08 — Focused on reliability improvements and configurable replication behavior in eBay/HomeStore to drive stability and business value. Key changes centered on allocation signaling accuracy and granular replication control, enabling better resource utilization and targeted data push to followers. The work aligns with performance and reliability goals, and establishes groundwork for more maintainable replication policies. Impact highlights include corrected error signaling for allocation failures, which reduces misinterpretation of resource state, and a new replication control flag that enables smarter data synchronization across raft followers.
August 2025
July 2025
1 Commits
Jul 1, 2025July 2025: Delivered a critical fix to the block allocator in eBay/HomeStore to improve concurrency reliability and observability, with an accompanying version bump. This work enhances system stability under high-load scenarios and simplifies debugging, contributing to lower incident risk and faster recovery.
July 2025
1 Commits
Jul 1, 2025July 2025: Delivered a critical fix to the block allocator in eBay/HomeStore to improve concurrency reliability and observability, with an accompanying version bump. This work enhances system stability under high-load scenarios and simplifies debugging, contributing to lower incident risk and faster recovery.
June 2025
2 Commits • 2 Features
Jun 1, 2025June 2025: Delivered two core features in eBay/HomeStore to improve capacity visibility and resilience: 1) VChunk Get Used Blocks API to report used blocks in virtual chunks, enabling accurate capacity planning and usage analytics; 2) Improved on_no_space_left error context by updating the signature to accept a sisl::blob header, providing richer diagnostics for allocation failures. Updated homestore version to 6.17.1. These changes enhance observability, reliability, and maintainability, reducing incident response time and supporting data-driven capacity decisions.
2 Commits • 2 Features
Jun 1, 2025June 2025: Delivered two core features in eBay/HomeStore to improve capacity visibility and resilience: 1) VChunk Get Used Blocks API to report used blocks in virtual chunks, enabling accurate capacity planning and usage analytics; 2) Improved on_no_space_left error context by updating the signature to accept a sisl::blob header, providing richer diagnostics for allocation failures. Updated homestore version to 6.17.1. These changes enhance observability, reliability, and maintainability, reducing incident response time and supporting data-driven capacity decisions.
June 2025
April 2025
4 Commits • 2 Features
Apr 1, 2025April 2025 monthly summary for eBay/HomeStore: Key features delivered: - Raft disk space handling improvements: added NO_SPACE_LEFT support with new error codes and states; test suite optimizations to simulate no space left and disable leader push data to reduce I/O. - Raft replication LSN tracking enhancements: corrected LSN calculation; added support for configuration rollbacks and periodic notifications of the latest committed LSN to upper layers. Major bugs fixed: - Improved resilience in disk-space edge cases and corrected LSN computation paths to ensure consistent replication state during rollbacks. Overall impact and accomplishments: - Increased reliability and data consistency under low-disk conditions; reduced I/O load during testing; clearer signaling of commit progress to upper layers, enabling faster recovery and safer configuration changes. Technologies/skills demonstrated: - Raft internals, disk-space error handling, and LSN tracking; test harness optimization; commit-driven development; exposure to rollback semantics and cross-layer notifications.
April 2025
4 Commits • 2 Features
Apr 1, 2025April 2025 monthly summary for eBay/HomeStore: Key features delivered: - Raft disk space handling improvements: added NO_SPACE_LEFT support with new error codes and states; test suite optimizations to simulate no space left and disable leader push data to reduce I/O. - Raft replication LSN tracking enhancements: corrected LSN calculation; added support for configuration rollbacks and periodic notifications of the latest committed LSN to upper layers. Major bugs fixed: - Improved resilience in disk-space edge cases and corrected LSN computation paths to ensure consistent replication state during rollbacks. Overall impact and accomplishments: - Increased reliability and data consistency under low-disk conditions; reduced I/O load during testing; clearer signaling of commit progress to upper layers, enabling faster recovery and safer configuration changes. Technologies/skills demonstrated: - Raft internals, disk-space error handling, and LSN tracking; test harness optimization; commit-driven development; exposure to rollback semantics and cross-layer notifications.
March 2025
1 Commits • 1 Features
Mar 1, 2025Month: 2025-03 — Focused on strengthening the replication subsystem in eBay/HomeStore by adding event callbacks to the replication layer, enabling the upper layer to handle critical replication events through dedicated callbacks. This delivers greater flexibility, resilience, and control over replication workflows with minimal surface area changes.
1 Commits • 1 Features
Mar 1, 2025Month: 2025-03 — Focused on strengthening the replication subsystem in eBay/HomeStore by adding event callbacks to the replication layer, enabling the upper layer to handle critical replication events through dedicated callbacks. This delivers greater flexibility, resilience, and control over replication workflows with minimal surface area changes.
March 2025
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary — eBay/HomeStore: Delivered a graceful shutdown framework across HomeStore components, introducing atomic flags and per-request counters to track pending operations; ensured in-flight requests complete before services stop and new requests are rejected during shutdown, significantly increasing stability during maintenance. Fixed a deadlock during graceful shutdown in the replication map by optimizing the locking path and promptly releasing the mutex; version bumped to 6.6.23. These changes improve reliability during upgrades and reduce downtime risk.
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary — eBay/HomeStore: Delivered a graceful shutdown framework across HomeStore components, introducing atomic flags and per-request counters to track pending operations; ensured in-flight requests complete before services stop and new requests are rejected during shutdown, significantly increasing stability during maintenance. Fixed a deadlock during graceful shutdown in the replication map by optimizing the locking path and promptly releasing the mutex; version bumped to 6.6.23. These changes improve reliability during upgrades and reduce downtime risk.
December 2024
4 Commits
Dec 1, 2024December 2024 monthly summary for eBay/HomeStore: focused on stability and lifecycle hardening of HomeRaftLogStore. Implemented key fixes to address race conditions during log replay, prevent improper restart during destroy-pending replication devices, avoid double leave() calls on node destruction, and correct last_entry handling by returning a dummy entry when no logs exist and updating the last durable LSN after replay. These changes were delivered via four commits addressing initialization, destroy-pending restart, duplicate leave calls, and last_entry handling. Result: improved reliability, safer node lifecycle operations, and more accurate log state tracking, reducing exposure to outages during maintenance and replays.
4 Commits
Dec 1, 2024December 2024 monthly summary for eBay/HomeStore: focused on stability and lifecycle hardening of HomeRaftLogStore. Implemented key fixes to address race conditions during log replay, prevent improper restart during destroy-pending replication devices, avoid double leave() calls on node destruction, and correct last_entry handling by returning a dummy entry when no logs exist and updating the last durable LSN after replay. These changes were delivered via four commits addressing initialization, destroy-pending restart, duplicate leave calls, and last_entry handling. Result: improved reliability, safer node lifecycle operations, and more accurate log state tracking, reducing exposure to outages during maintenance and replays.
December 2024
November 2024
2 Commits • 1 Features
Nov 1, 2024November 2024 — HomeStore (eBay). Strengthened the reliability of the Raft-based replication path and node lifecycle handling. Implemented robust log batching under follower backpressure to prevent shard creation failures and ensure sequential processing, and added RemovedFromCluster handling with cleanup paths and reset functionality for allocator and vchunk to support future listener destruction logic. These changes improve stability under load, reduce the likelihood of batch rejections, and streamline maintenance for dynamic cluster membership.
November 2024
2 Commits • 1 Features
Nov 1, 2024November 2024 — HomeStore (eBay). Strengthened the reliability of the Raft-based replication path and node lifecycle handling. Implemented robust log batching under follower backpressure to prevent shard creation failures and ensure sequential processing, and added RemovedFromCluster handling with cleanup paths and reset functionality for allocator and vchunk to support future listener destruction logic. These changes improve stability under load, reduce the likelihood of batch rejections, and streamline maintenance for dynamic cluster membership.
October 2024
1 Commits • 1 Features
Oct 1, 2024October 2024 monthly summary for eBay/HomeStore focused on API visibility improvements for VChunk. Key feature delivered: VChunk Size API Enhancement with a version bump and commit trace. Overall impact includes improved resource planning and API consumer visibility, with maintainable API evolution.
1 Commits • 1 Features
Oct 1, 2024October 2024 monthly summary for eBay/HomeStore focused on API visibility improvements for VChunk. Key feature delivered: VChunk Size API Enhancement with a version bump and commit trace. Overall impact includes improved resource planning and API consumer visibility, with maintainable API evolution.
October 2024
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Quality Metrics
Correctness85.8%
Maintainability82.6%
Architecture80.6%
Performance73.6%
AI Usage21.0%
Skills & Technologies
Programming Languages
C++Python
Technical Skills
API DesignBug FixingBuild SystemBuild System ManagementC++C++ DevelopmentConanConcurrencyConfiguration ManagementDistributed SystemsError HandlingEvent HandlingLog ReplicationLog Sequence NumbersLog Storage
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