percona/percona-backup-mongodb
Nov 2025 – Jun 2026
8 Months active
Languages Used
GoYAML
Technical Skills
CLI DevelopmentCLI developmentGoGo programmingback end developmentbackend development
Jakub Cechacek
PROFILE
Jakub Cechacek
Worked extensively on the percona/percona-backup-mongodb repository, delivering 42 features and resolving 16 bugs over eight months. Focused on enhancing backup and restore reliability, the work included profile-driven backup management, robust error handling, and integration with cloud storage backends such as AWS and OCI. Leveraging Go and YAML, the developer implemented improvements in CLI usability, authentication, and data integrity, while introducing test-driven development practices for safer releases. Contributions also addressed operational resilience, including PITR enhancements, concurrent programming for storage operations, and improved observability. These efforts resulted in a more reliable, scalable, and maintainable backup solution for MongoDB environments.
Overall Statistics
Feature vs Bugs
72%Features
Repository Contributions
167Total
Bugs
16
Commits
167
Features
42
Lines of code
3,855,367
Activity Months8
Your Network
97 peopleWork History
June 2026
9 Commits • 5 Features
Jun 1, 2026Month: 2026-06 — Summary of business value and technical achievements for percona/percona-backup-mongodb. Key features delivered: - OplogRestore: Strip physical create metadata during replay and document synthetic create-drop cleanup path. Commits: 7d7d0aa29fcf646dd3f73e6ad89c21b2a4471d4; bb3ba8eb16781ee2230aef714674fc04894d974c. - FCV lookup improvements for clustered MongoDB (mongos/config server): Using the config server replica set for FCV lookup with a follow-up revert to topology-based lookup for cluster stability. Commits: 52863943a39603af9acd9c83fd585d486edc601c; 9b0f9928b02e4fb7b6abc26ebeffd651f34a2f41. - Namespace cloning: metadata stripping during clone with tests validating correct metadata stripping or preservation based on context. Commit: adba1c986d62b136fba1ce3addb896eb6e12e4d8. - Backup process: enforce mongos connection rejection and cleanup; removes an unused connection validation function. Commits: 5ccc272176cac66d0257c9cc2e11499b755dc38f; 9dda392148a015fadb915b898746a3adb00a24a2. - Chunk download reliability: improved error handling and retry; avoids swallowing chunk download errors; updates error wrapping for proper unwrapping; regression tests added. Commits: 5dfb9729f41e63290d57b004d41c710bd836bb29; 9158ad5ff47af6ef64d882b53bd147d726142949. Major bugs fixed: - FCV lookup path via mongos: initial fix attempted, later reverted to topology-based approach to preserve cluster stability (commits: 52863943a39603af9acd9c83fd585d486edc601c; 9b0f9928b02e4fb7b6abc26ebeffd651f34a2f41). - Chunk download error swallowing: improved detection and unwrapping, ensuring outer retry logic remains effective; regression tests added (commits: 5dfb9729f41e63290d57b004d41c710bd836bb29; 9158ad5ff47af6ef64d882b53bd147d726142949). Overall impact and accomplishments: - Increased backup reliability and data integrity, with safer namespace cloning and clearer error visibility in chunk downloads. The FCV lookup work now balances performance with cluster stability. Security and resource safety improved by enforcing mongos connection rejection to backup primaries. Regression tests and robust error handling increase maintainability and confidence in future backup/restore cycles. Technologies/skills demonstrated: - Go language error handling patterns (errors.As, error wrapping/unwrapping) and test-driven development. - MongoDB cluster topology concepts (config server replica sets, mongos, topology-based FCV lookup). - Metadata hygiene during replay and cloning, and robust retry logic for IO-bound operations.
9 Commits • 5 Features
Jun 1, 2026Month: 2026-06 — Summary of business value and technical achievements for percona/percona-backup-mongodb. Key features delivered: - OplogRestore: Strip physical create metadata during replay and document synthetic create-drop cleanup path. Commits: 7d7d0aa29fcf646dd3f73e6ad89c21b2a4471d4; bb3ba8eb16781ee2230aef714674fc04894d974c. - FCV lookup improvements for clustered MongoDB (mongos/config server): Using the config server replica set for FCV lookup with a follow-up revert to topology-based lookup for cluster stability. Commits: 52863943a39603af9acd9c83fd585d486edc601c; 9b0f9928b02e4fb7b6abc26ebeffd651f34a2f41. - Namespace cloning: metadata stripping during clone with tests validating correct metadata stripping or preservation based on context. Commit: adba1c986d62b136fba1ce3addb896eb6e12e4d8. - Backup process: enforce mongos connection rejection and cleanup; removes an unused connection validation function. Commits: 5ccc272176cac66d0257c9cc2e11499b755dc38f; 9dda392148a015fadb915b898746a3adb00a24a2. - Chunk download reliability: improved error handling and retry; avoids swallowing chunk download errors; updates error wrapping for proper unwrapping; regression tests added. Commits: 5dfb9729f41e63290d57b004d41c710bd836bb29; 9158ad5ff47af6ef64d882b53bd147d726142949. Major bugs fixed: - FCV lookup path via mongos: initial fix attempted, later reverted to topology-based approach to preserve cluster stability (commits: 52863943a39603af9acd9c83fd585d486edc601c; 9b0f9928b02e4fb7b6abc26ebeffd651f34a2f41). - Chunk download error swallowing: improved detection and unwrapping, ensuring outer retry logic remains effective; regression tests added (commits: 5dfb9729f41e63290d57b004d41c710bd836bb29; 9158ad5ff47af6ef64d882b53bd147d726142949). Overall impact and accomplishments: - Increased backup reliability and data integrity, with safer namespace cloning and clearer error visibility in chunk downloads. The FCV lookup work now balances performance with cluster stability. Security and resource safety improved by enforcing mongos connection rejection to backup primaries. Regression tests and robust error handling increase maintainability and confidence in future backup/restore cycles. Technologies/skills demonstrated: - Go language error handling patterns (errors.As, error wrapping/unwrapping) and test-driven development. - MongoDB cluster topology concepts (config server replica sets, mongos, topology-based FCV lookup). - Metadata hygiene during replay and cloning, and robust retry logic for IO-bound operations.
June 2026
May 2026
32 Commits • 6 Features
May 1, 2026May 2026: Delivered key business and technical improvements for PBM (Percona Backup for MongoDB). Focused on reliability, performance, and cloud storage integration. Major work includes core restore index commit quorum with config wiring, overrides, and default quorum; native OCI object storage backend with copy, polling, retries, and concurrent downloading; and support for multiple OCI authentication methods (credentials, instance principal, and OKE workload identity). Strengthened index commit quorum resilience with limited validation, retry logic, and logging, and addressed critical restore robustness issues (shadowing errors and duplicate PITR wake). Also advanced OCI storage configuration and documentation groundwork to reduce operator toil and improve performance.
May 2026
32 Commits • 6 Features
May 1, 2026May 2026: Delivered key business and technical improvements for PBM (Percona Backup for MongoDB). Focused on reliability, performance, and cloud storage integration. Major work includes core restore index commit quorum with config wiring, overrides, and default quorum; native OCI object storage backend with copy, polling, retries, and concurrent downloading; and support for multiple OCI authentication methods (credentials, instance principal, and OKE workload identity). Strengthened index commit quorum resilience with limited validation, retry logic, and logging, and addressed critical restore robustness issues (shadowing errors and duplicate PITR wake). Also advanced OCI storage configuration and documentation groundwork to reduce operator toil and improve performance.
April 2026
4 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for the Percona Backup for MongoDB repository focusing on hardening backup data integrity, error handling, and JSON-based metadata output. Deliveries centered on safer stop behavior during cluster errors, clearer error propagation across monitors, and downstream-friendly metadata formats, resulting in a more reliable backup/PITR workflow and easier integration with data pipelines.
4 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for the Percona Backup for MongoDB repository focusing on hardening backup data integrity, error handling, and JSON-based metadata output. Deliveries centered on safer stop behavior during cluster errors, clearer error propagation across monitors, and downstream-friendly metadata formats, resulting in a more reliable backup/PITR workflow and easier integration with data pipelines.
April 2026
March 2026
36 Commits • 10 Features
Mar 1, 2026March 2026 focused on strengthening backup reliability, reducing operational toil, and improving security posture for the PBM MongoDB backup/restore workflow. Key features delivered included Balancer Stop Command Improvements (configurable timeouts, centralized StopBalancer flow, and server-side timeout handling with BalancerStopMin type changes) and PITR Slicer Stop Control Enhancements (correct stop behavior for physical restores, longer stop timeouts, and leader-only slicer disable during restore). Major bug fixes stabilized backup wait and status logic, introduced stale heartbeat checks, and hardened error propagation to prevent silent hangs. Reliability improvements extended to authentication detection, shutdown flow improvements, and Mongo URI handling (including rejection of mongodb+srv://), enhancing security and operability. Ancillary improvements delivered better sizing and upload observability (namespace sizes: logical and on-disk; upload size hints when compression is off) to improve monitoring, sizing decisions, and data transfer efficiency. Overall, these efforts increased reliability, reduced incident risk, and accelerated restore readiness, while improving security and developer productivity.
March 2026
36 Commits • 10 Features
Mar 1, 2026March 2026 focused on strengthening backup reliability, reducing operational toil, and improving security posture for the PBM MongoDB backup/restore workflow. Key features delivered included Balancer Stop Command Improvements (configurable timeouts, centralized StopBalancer flow, and server-side timeout handling with BalancerStopMin type changes) and PITR Slicer Stop Control Enhancements (correct stop behavior for physical restores, longer stop timeouts, and leader-only slicer disable during restore). Major bug fixes stabilized backup wait and status logic, introduced stale heartbeat checks, and hardened error propagation to prevent silent hangs. Reliability improvements extended to authentication detection, shutdown flow improvements, and Mongo URI handling (including rejection of mongodb+srv://), enhancing security and operability. Ancillary improvements delivered better sizing and upload observability (namespace sizes: logical and on-disk; upload size hints when compression is off) to improve monitoring, sizing decisions, and data transfer efficiency. Overall, these efforts increased reliability, reduced incident risk, and accelerated restore readiness, while improving security and developer productivity.
February 2026
11 Commits • 3 Features
Feb 1, 2026February 2026 monthly highlights for percona/percona-backup-mongodb: improved storage reliability and user-facing profile management; expanded backup/restore capabilities with users/roles and PITR prioritization; and improved operator guidance through corrected help text and clearer error messaging. These changes reduce backup/discovery failures, streamline profile handling, and enhance data protection coverage with more predictable behavior in backup/restore workflows.
11 Commits • 3 Features
Feb 1, 2026February 2026 monthly highlights for percona/percona-backup-mongodb: improved storage reliability and user-facing profile management; expanded backup/restore capabilities with users/roles and PITR prioritization; and improved operator guidance through corrected help text and clearer error messaging. These changes reduce backup/discovery failures, streamline profile handling, and enhance data protection coverage with more predictable behavior in backup/restore workflows.
February 2026
January 2026
25 Commits • 6 Features
Jan 1, 2026January 2026 monthly summary for percona/percona-backup-mongodb. Focused on delivering business-value features, strengthening reliability, and improving performance. Key outcomes include safer selective restore workflows for users/roles and config databases with comprehensive tests; safer OplogRestore configuration via setter; enhanced profile handling with compatibility and type-safety; performance improvements through log indexing; and CLI/UX improvements with ProfileFlag/Name system. Also addressed critical bugs in Google authentication internals and GCS identity/config handling, reducing risk of outages and flaky tests.
January 2026
25 Commits • 6 Features
Jan 1, 2026January 2026 monthly summary for percona/percona-backup-mongodb. Focused on delivering business-value features, strengthening reliability, and improving performance. Key outcomes include safer selective restore workflows for users/roles and config databases with comprehensive tests; safer OplogRestore configuration via setter; enhanced profile handling with compatibility and type-safety; performance improvements through log indexing; and CLI/UX improvements with ProfileFlag/Name system. Also addressed critical bugs in Google authentication internals and GCS identity/config handling, reducing risk of outages and flaky tests.
December 2025
31 Commits • 10 Features
Dec 1, 2025December 2025 — Percona Backup for MongoDB (percona/percona-backup-mongodb) delivered substantial reliability, observability, and multi-profile governance enhancements while continuing to modernize backup/restore workflows. Primary focus areas included storage identity resync, profile-aware operations, and robust PITR/backups handling.
31 Commits • 10 Features
Dec 1, 2025December 2025 — Percona Backup for MongoDB (percona/percona-backup-mongodb) delivered substantial reliability, observability, and multi-profile governance enhancements while continuing to modernize backup/restore workflows. Primary focus areas included storage identity resync, profile-aware operations, and robust PITR/backups handling.
December 2025
November 2025
19 Commits • 1 Features
Nov 1, 2025November 2025 focused on delivering profile-based backup management (PBM) enhancements across the CLI and agent. Key work includes introducing profile-aware operations, validating profiles before destructive actions, and aligning storage handling with profile configurations. The release also enhances incremental PITR cleanup, improves observability through logging with profile context, and broadens test coverage and documentation to support enterprise-scale usage. These changes reduce risk of accidental deletions, improve backup lifecycle reliability, and lay the groundwork for scalable, profile-driven backup workflows.
November 2025
19 Commits • 1 Features
Nov 1, 2025November 2025 focused on delivering profile-based backup management (PBM) enhancements across the CLI and agent. Key work includes introducing profile-aware operations, validating profiles before destructive actions, and aligning storage handling with profile configurations. The release also enhances incremental PITR cleanup, improves observability through logging with profile context, and broadens test coverage and documentation to support enterprise-scale usage. These changes reduce risk of accidental deletions, improve backup lifecycle reliability, and lay the groundwork for scalable, profile-driven backup workflows.
Activity
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Quality Metrics
Correctness96.0%
Maintainability89.0%
Architecture90.0%
Performance89.0%
AI Usage21.0%
Skills & Technologies
Programming Languages
GoYAML
Technical Skills
API DevelopmentAPI developmentAPI integrationAWS SDKBackend DevelopmentCLI DevelopmentCLI developmentContinuous IntegrationDevOpsError HandlingGoGo ProgrammingGo programmingGoogle Cloud PlatformMongoDB
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