taosdata/TDengine
Feb 2025 – May 2026
16 Months active
Languages Used
CMarkdownPythonCMakeLists.txtC++CMakeJSONSQL
Technical Skills
Backend DevelopmentC ProgrammingDatabaseDatabase InternalsDatabase TestingDebugging
Kaili Xu
PROFILE
Kaili Xu
Over 16 months, contributed to taosdata/TDengine by building and refining core backend features focused on security, reliability, and data governance. Developed and enhanced role-based access control, privilege management, and authentication mechanisms, implementing granular RBAC policies and security models such as MAC and SoD. Improved database internals by optimizing concurrency, log management, and high-availability enforcement, while expanding support for new data sources and grant types. Addressed critical bugs in SQL parsing, resource management, and timing accuracy. Used C, C++, and Python to deliver robust, test-driven solutions, consistently updating documentation and tests to ensure maintainability and cross-version compatibility.
Overall Statistics
Feature vs Bugs
64%Features
Repository Contributions
104Total
Bugs
21
Commits
104
Features
37
Lines of code
52,056
Activity Months16
Your Network
119 peopleSame Organization
@taosdata.com31
MingRen ChenMember
xiao-77Member
Bomin ZhangMember
Bo XiaoMember
Qin ChongMember
Yaming PeiMember
guozhenweiMember
hongzhenliu335Member
tangfangzhiMember
Shared Repositories
88
Work History
May 2026
1 Commits
May 1, 2026May 2026: Security hardening and access-control reliability for TDengine.
1 Commits
May 1, 2026May 2026: Security hardening and access-control reliability for TDengine.
May 2026
April 2026
7 Commits • 3 Features
Apr 1, 2026April 2026 monthly performance summary focusing on security-first TDengine improvements: policy-driven access controls, RBAC refinements, and data masking, with expanded test coverage and documentation. Delivered measurable business value in security posture, compliance readiness, and safer data exposure while enabling authorized data operations for DB owners.
April 2026
7 Commits • 3 Features
Apr 1, 2026April 2026 monthly performance summary focusing on security-first TDengine improvements: policy-driven access controls, RBAC refinements, and data masking, with expanded test coverage and documentation. Delivered measurable business value in security posture, compliance readiness, and safer data exposure while enabling authorized data operations for DB owners.
March 2026
10 Commits • 5 Features
Mar 1, 2026March 2026 TDengine monthly summary focusing on security, data handling, and observability improvements across several core areas. Delivered backward-compatible RBAC and user management enhancements, improved time-series migration and metrics accuracy, and strengthened logging/monitoring. Introduced an internal configuration toggle for assertion handling to enable safer debugging and future-proofing. All changes maintain 3.3 compatibility where applicable and emphasize business value through reliability, security, and operational insight.
10 Commits • 5 Features
Mar 1, 2026March 2026 TDengine monthly summary focusing on security, data handling, and observability improvements across several core areas. Delivered backward-compatible RBAC and user management enhancements, improved time-series migration and metrics accuracy, and strengthened logging/monitoring. Introduced an internal configuration toggle for assertion handling to enable safer debugging and future-proofing. All changes maintain 3.3 compatibility where applicable and emphasize business value through reliability, security, and operational insight.
March 2026
February 2026
6 Commits • 3 Features
Feb 1, 2026February 2026: Delivered targeted features and bug fixes in TDengine focusing on privilege management, RBAC robustness, test reliability, and documentation. Highlights include OwnerId inclusion in metadata responses, TFS disk allocation test enhancements, RBAC permission/documentation refinements, and robust handling of dropping non-existent tables with clear error messages. All changes emphasize business value by strengthening security controls, improving reliability, and clarifying permissions.
February 2026
6 Commits • 3 Features
Feb 1, 2026February 2026: Delivered targeted features and bug fixes in TDengine focusing on privilege management, RBAC robustness, test reliability, and documentation. Highlights include OwnerId inclusion in metadata responses, TFS disk allocation test enhancements, RBAC permission/documentation refinements, and robust handling of dropping non-existent tables with clear error messages. All changes emphasize business value by strengthening security controls, improving reliability, and clarifying permissions.
January 2026
5 Commits • 3 Features
Jan 1, 2026Concise monthly summary for 2026-01 focused on TDengine (taosdata/TDengine). Key features delivered include RBAC and Stream Access Control Enhancements, Authentication Cache Reliability Fix, Subscription Consumer Identity Verification, and Timer Precision improvements. Major bugs fixed include authentication bypass risk in cache during data insertion. The changes deliver stronger security, improved reliability, and better timing accuracy, aligning with business aims for secure data access, data integrity, and system responsiveness.
5 Commits • 3 Features
Jan 1, 2026Concise monthly summary for 2026-01 focused on TDengine (taosdata/TDengine). Key features delivered include RBAC and Stream Access Control Enhancements, Authentication Cache Reliability Fix, Subscription Consumer Identity Verification, and Timer Precision improvements. Major bugs fixed include authentication bypass risk in cache during data insertion. The changes deliver stronger security, improved reliability, and better timing accuracy, aligning with business aims for secure data access, data integrity, and system responsiveness.
January 2026
December 2025
6 Commits • 2 Features
Dec 1, 2025Month: 2025-12 — Strengthened security governance, data-access controls, and cross-version reliability in taosdata/TDengine. Delivered Pulsar data source grant integration, RBAC core enhancements, and vgroup decoding compatibility fixes, with updated tests to ensure ongoing quality and easier maintenance across versions.
December 2025
6 Commits • 2 Features
Dec 1, 2025Month: 2025-12 — Strengthened security governance, data-access controls, and cross-version reliability in taosdata/TDengine. Delivered Pulsar data source grant integration, RBAC core enhancements, and vgroup decoding compatibility fixes, with updated tests to ensure ongoing quality and easier maintenance across versions.
November 2025
4 Commits • 3 Features
Nov 1, 2025November 2025 performance summary for taosdata/TDengine. Focused on delivering robust time-series capabilities, packaging improvements, enhanced operational visibility, and test automation enhancements. Four primary efforts spanned RSMA correctness, packaging workflow, privilege-based visibility, and testing reliability.
4 Commits • 3 Features
Nov 1, 2025November 2025 performance summary for taosdata/TDengine. Focused on delivering robust time-series capabilities, packaging improvements, enhanced operational visibility, and test automation enhancements. Four primary efforts spanned RSMA correctness, packaging workflow, privilege-based visibility, and testing reliability.
November 2025
October 2025
9 Commits • 3 Features
Oct 1, 2025October 2025 TDengine monthly summary: delivered key features, fixed critical issues, and improved test efficiency while strengthening data governance and concurrency reliability. Focused on storage efficiency, performance, and developer experience to drive business value for high-volume time-series workloads.
October 2025
9 Commits • 3 Features
Oct 1, 2025October 2025 TDengine monthly summary: delivered key features, fixed critical issues, and improved test efficiency while strengthening data governance and concurrency reliability. Focused on storage efficiency, performance, and developer experience to drive business value for high-volume time-series workloads.
September 2025
8 Commits • 3 Features
Sep 1, 2025September 2025 highlights for taosdata/TDengine include stability improvements, feature expansions, and accessibility enhancements across core data-management capabilities. Notable work includes robust resource cleanup for file I/O by destroying mutexes to prevent resource leaks, rollup analytics enhancements enabling end-to-end rollup task lifecycle and RSMA/rollup schema integration, migration of the TSDB retention monitor from enterprise to the community edition to broaden usage, and strengthened data governance with privilege checks for the show stables operation along with accompanying tests. Demonstrated strengths in concurrent resource management, feature-driven development, open-source contribution, and test-driven security.
8 Commits • 3 Features
Sep 1, 2025September 2025 highlights for taosdata/TDengine include stability improvements, feature expansions, and accessibility enhancements across core data-management capabilities. Notable work includes robust resource cleanup for file I/O by destroying mutexes to prevent resource leaks, rollup analytics enhancements enabling end-to-end rollup task lifecycle and RSMA/rollup schema integration, migration of the TSDB retention monitor from enterprise to the community edition to broaden usage, and strengthened data governance with privilege checks for the show stables operation along with accompanying tests. Demonstrated strengths in concurrent resource management, feature-driven development, open-source contribution, and test-driven security.
September 2025
August 2025
7 Commits
Aug 1, 2025In August 2025, focused on reliability and correctness improvements for TDengine in taosdata/TDengine. Delivered stability enhancements for node state reporting and robustness hardening for column insert mode merge sort, accompanied by expanded test coverage for multi-insert scenarios. The work reduces operational risk, improves data integrity, and strengthens the codebase against edge cases, with clear, test-backed improvements across core data-paths.
August 2025
7 Commits
Aug 1, 2025In August 2025, focused on reliability and correctness improvements for TDengine in taosdata/TDengine. Delivered stability enhancements for node state reporting and robustness hardening for column insert mode merge sort, accompanied by expanded test coverage for multi-insert scenarios. The work reduces operational risk, improves data integrity, and strengthens the codebase against edge cases, with clear, test-backed improvements across core data-paths.
July 2025
18 Commits • 3 Features
Jul 1, 2025In July 2025, completed significant feature work and reliability fixes for taosdata/TDengine. Delivered vnode grant support with enhanced storage size reporting and integrated vnodes into the grant system; added robust mounting support with SQL commands for create/drop/show mounts; expanded data source capabilities with ORC support; and standardized terminology across the product. Concurrently hardened security and reliability through targeted fixes and improved observability. Updated tests to reflect changes and maintained alignment with product naming and data-management workflows.
18 Commits • 3 Features
Jul 1, 2025In July 2025, completed significant feature work and reliability fixes for taosdata/TDengine. Delivered vnode grant support with enhanced storage size reporting and integrated vnodes into the grant system; added robust mounting support with SQL commands for create/drop/show mounts; expanded data source capabilities with ORC support; and standardized terminology across the product. Concurrently hardened security and reliability through targeted fixes and improved observability. Updated tests to reflect changes and maintained alignment with product naming and data-management workflows.
July 2025
June 2025
4 Commits • 2 Features
Jun 1, 2025June 2025 TDengine monthly summary: Delivered governance and reliability improvements across the taosdata/TDengine repository. Implemented Grant System Enhancements and Grant Display Improvements (vnode/storage_size limits, TDasset items, new flags and error codes) with updated tests; fixed a race condition in tsDndUpTime update to ensure correct uptime calculations; and hardened Log Rotation (running flag, robust file-prefix matching, randomized delay) to reduce thread pressure and improve stability. These changes increase grant visibility, uptime accuracy, and overall performance, supported by updated test coverage.
June 2025
4 Commits • 2 Features
Jun 1, 2025June 2025 TDengine monthly summary: Delivered governance and reliability improvements across the taosdata/TDengine repository. Implemented Grant System Enhancements and Grant Display Improvements (vnode/storage_size limits, TDasset items, new flags and error codes) with updated tests; fixed a race condition in tsDndUpTime update to ensure correct uptime calculations; and hardened Log Rotation (running flag, robust file-prefix matching, randomized delay) to reduce thread pressure and improve stability. These changes increase grant visibility, uptime accuracy, and overall performance, supported by updated test coverage.
May 2025
4 Commits • 2 Features
May 1, 2025May 2025 monthly summary for taosdata/TDengine: Delivered key features to strengthen high-availability, expanded data-source governance, and improved parsing reliability. Highlights include: - Feature: Dual replica functionality enforcement and testing. Implemented grantCheckDualReplicaDnodes to enforce that, under dual replica HA with a dnode limit of 2, the number of dnodes with vgroups does not exceed 2, and updated dnode-building logic. Added tests verifying dual replica behavior to improve coverage. Key commits: a65dd404ee774031d61e33c8af3d1d09e63273ee; aa7aba61b3e07cb24f5dd7c10cba7b0775193407. - Feature: SparkplugB data source support in grant system. Extended the grant system to support the SparkplugB data source, updated tests to expect an additional grant item, and added SparkplugB to the information schema. Commit: 7ab4a4fa7f567d07bf2faf638ca894bc88c934ad. - Bug fix: Robust parsing for identifiers with duplicate quotation marks. Fixed handling of naming rules when duplicate quotation marks appear within identifiers, improving SQL parser robustness. Commit: 8d361be3e7714aa2cf05b918590f251a29761e55. Impact: Improved deployment reliability with stricter HA governance, expanded data-source visibility and governance through SparkplugB support, and increased parser robustness to reduce syntax errors in complex naming scenarios. Enhanced test coverage provides greater confidence for future changes. Technologies/skills demonstrated: changes to HA enforcement logic, grant system extension, information schema updates, and parser robustness testing; emphasis on test-driven development and maintainability across TDengine features.
4 Commits • 2 Features
May 1, 2025May 2025 monthly summary for taosdata/TDengine: Delivered key features to strengthen high-availability, expanded data-source governance, and improved parsing reliability. Highlights include: - Feature: Dual replica functionality enforcement and testing. Implemented grantCheckDualReplicaDnodes to enforce that, under dual replica HA with a dnode limit of 2, the number of dnodes with vgroups does not exceed 2, and updated dnode-building logic. Added tests verifying dual replica behavior to improve coverage. Key commits: a65dd404ee774031d61e33c8af3d1d09e63273ee; aa7aba61b3e07cb24f5dd7c10cba7b0775193407. - Feature: SparkplugB data source support in grant system. Extended the grant system to support the SparkplugB data source, updated tests to expect an additional grant item, and added SparkplugB to the information schema. Commit: 7ab4a4fa7f567d07bf2faf638ca894bc88c934ad. - Bug fix: Robust parsing for identifiers with duplicate quotation marks. Fixed handling of naming rules when duplicate quotation marks appear within identifiers, improving SQL parser robustness. Commit: 8d361be3e7714aa2cf05b918590f251a29761e55. Impact: Improved deployment reliability with stricter HA governance, expanded data-source visibility and governance through SparkplugB support, and increased parser robustness to reduce syntax errors in complex naming scenarios. Enhanced test coverage provides greater confidence for future changes. Technologies/skills demonstrated: changes to HA enforcement logic, grant system extension, information schema updates, and parser robustness testing; emphasis on test-driven development and maintainability across TDengine features.
May 2025
April 2025
4 Commits • 1 Features
Apr 1, 2025April 2025 TDengine development focused on reliability, correctness, and governance in the logging and statistics subsystems. Delivered enhanced logging system with updated test coverage and revocation logging for sign-in grants, plus improvements to test suites. Fixed virtual table time-series statistics by introducing a table-type flag and ensuring virtual tables are excluded from certain statistics calculations. Unified log retention behavior for logKeepDays so negative values now match positive values, with updated documentation and C code to reflect the change. These efforts improve observability, data accuracy, and policy consistency, reducing incident risk and clarifying retention semantics. Notable commits cover: - 6bc105130a7b79bb9317c46c18936a1738142e1d: enh: test coverage for tlog.c (#30631) - f1e480ef53e8f33b58675370271af141ee4b0d9f: enh: support revoke sign in show grants logs (#30929) - b88ec2f1a8ae2aa7cb90c17569e82e5d6c46fe31: fix: timeseries statis for virtual table (#30911) - ee289615e8e147284a45bd57333cec5c6c06e95d: enh: behavior of negative logKeepDays identical to positive values (#30939)
April 2025
4 Commits • 1 Features
Apr 1, 2025April 2025 TDengine development focused on reliability, correctness, and governance in the logging and statistics subsystems. Delivered enhanced logging system with updated test coverage and revocation logging for sign-in grants, plus improvements to test suites. Fixed virtual table time-series statistics by introducing a table-type flag and ensuring virtual tables are excluded from certain statistics calculations. Unified log retention behavior for logKeepDays so negative values now match positive values, with updated documentation and C code to reflect the change. These efforts improve observability, data accuracy, and policy consistency, reducing incident risk and clarifying retention semantics. Notable commits cover: - 6bc105130a7b79bb9317c46c18936a1738142e1d: enh: test coverage for tlog.c (#30631) - f1e480ef53e8f33b58675370271af141ee4b0d9f: enh: support revoke sign in show grants logs (#30929) - b88ec2f1a8ae2aa7cb90c17569e82e5d6c46fe31: fix: timeseries statis for virtual table (#30911) - ee289615e8e147284a45bd57333cec5c6c06e95d: enh: behavior of negative logKeepDays identical to positive values (#30939)
March 2025
3 Commits • 1 Features
Mar 1, 2025Month 2025-03: Developer monthly summary for taosdata/TDengine. Focus was delivering cross-environment build capabilities, stabilizing CI, and improving log handling across integrated and non-integrated builds. The work drives platform flexibility, faster integration cycles, and more reliable deployments for TD_ASTRA-enabled environments.
3 Commits • 1 Features
Mar 1, 2025Month 2025-03: Developer monthly summary for taosdata/TDengine. Focus was delivering cross-environment build capabilities, stabilizing CI, and improving log handling across integrated and non-integrated builds. The work drives platform flexibility, faster integration cycles, and more reliable deployments for TD_ASTRA-enabled environments.
March 2025
February 2025
8 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for taosdata/TDengine: Delivered core feature improvements, stabilized critical data workflows, and expanded configurability. Focused on timeseries reliability, authentication/authorization extensions, and developer experience through testing and docs. These efforts enhance production reliability, performance tuning, and security-related grant handling.
February 2025
8 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for taosdata/TDengine: Delivered core feature improvements, stabilized critical data workflows, and expanded configurability. Focused on timeseries reliability, authentication/authorization extensions, and developer experience through testing and docs. These efforts enhance production reliability, performance tuning, and security-related grant handling.
Activity
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Quality Metrics
Correctness88.0%
Maintainability84.8%
Architecture83.2%
Performance79.4%
AI Usage22.8%
Skills & Technologies
Programming Languages
CC++CMakeCMakeLists.txtJSONMarkdownPythonSQLShell
Technical Skills
API DevelopmentAccess ControlAlgorithm ImplementationAlgorithm OptimizationBackend DevelopmentBug FixBug FixingBuild ConfigurationBuild System ConfigurationBuild SystemsC ProgrammingC programmingC++C++ developmentC++ programming
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline