percona/percona-backup-mongodb
Oct 2024 – Oct 2025
13 Months active
Languages Used
GoShellJavaScriptMarkdownYAML
Technical Skills
Backup and RestoreCommand-Line Interface (CLI)Database ManagementGo ProgrammingMongoDBBackend Development
Boris Ilijic
PROFILE
Boris Ilijic
Boris Ilijic engineered robust backup and restore workflows for the percona/percona-backup-mongodb repository, focusing on reliability, data integrity, and multi-cloud compatibility. He developed features such as split-merge middleware for scalable storage, enhanced physical and logical restore logic, and advanced configuration server handling, addressing complex scenarios in sharded and distributed MongoDB clusters. Using Go and leveraging technologies like MinIO, S3, and Azure, Boris implemented concurrency-safe storage operations, comprehensive error handling, and extensive end-to-end testing. His work improved operational observability, reduced recovery risk, and ensured consistent backup behavior across cloud providers, reflecting a deep, systematic approach to backend development and testing.
Overall Statistics
Feature vs Bugs
64%Features
Repository Contributions
244Total
Bugs
38
Commits
244
Features
67
Lines of code
398,851
Activity Months13
Your Network
86 people
Work History
October 2025
43 Commits • 8 Features
Oct 1, 2025October 2025 — Delivered a broad set of storage stability, configurability, and reliability improvements for Percona Backup for MongoDB (PBM). Key work spanned MinIO core stability fixes, expanded MinIO storage configuration, enhanced GCS and Azure integrations with robust retry and error-handling capabilities, and a suite of tests and benchmarks that improved quality and CI reliability. The changes increase backup reliability, reduce operational risk, and provide richer diagnostics and performance visibility for cloud storage backends (MinIO/S3, Azure, GCS), with stronger data integrity guarantees (CRC checks) and clearer documentation.
43 Commits • 8 Features
Oct 1, 2025October 2025 — Delivered a broad set of storage stability, configurability, and reliability improvements for Percona Backup for MongoDB (PBM). Key work spanned MinIO core stability fixes, expanded MinIO storage configuration, enhanced GCS and Azure integrations with robust retry and error-handling capabilities, and a suite of tests and benchmarks that improved quality and CI reliability. The changes increase backup reliability, reduce operational risk, and provide richer diagnostics and performance visibility for cloud storage backends (MinIO/S3, Azure, GCS), with stronger data integrity guarantees (CRC checks) and clearer documentation.
October 2025
September 2025
46 Commits • 26 Features
Sep 1, 2025Month: 2025-09 monthly summary for percona/percona-backup-mongodb. Focused on reliability, cross-storage consistency, and performance improvements, with expanded test coverage, documentation updates, and improved developer experience. The work delivered aligns with business value by stabilizing multi-cloud restore/delete semantics, enabling broader storage backends, and reducing maintenance costs via code quality improvements.
September 2025
46 Commits • 26 Features
Sep 1, 2025Month: 2025-09 monthly summary for percona/percona-backup-mongodb. Focused on reliability, cross-storage consistency, and performance improvements, with expanded test coverage, documentation updates, and improved developer experience. The work delivered aligns with business value by stabilizing multi-cloud restore/delete semantics, enabling broader storage backends, and reducing maintenance costs via code quality improvements.
August 2025
43 Commits • 13 Features
Aug 1, 2025August 2025 monthly summary for percona/percona-backup-mongodb: Delivered robustness and scalability improvements across restore, PITR, and storage workflows. Key features include enhanced restore capabilities with preserved UUID and missing-file handling; a new split-merge middleware core with storage operations; system.sessions PITR and oplog flow improvements; routing/UUID handling fixes; and sustained focus on quality through extensive tests and documentation housekeeping. These changes improve data integrity, restore reliability, multi-cloud storage readiness, and maintainability, enabling faster delivery of reliable backup/restore capabilities and safer multi-tenant workflows.
43 Commits • 13 Features
Aug 1, 2025August 2025 monthly summary for percona/percona-backup-mongodb: Delivered robustness and scalability improvements across restore, PITR, and storage workflows. Key features include enhanced restore capabilities with preserved UUID and missing-file handling; a new split-merge middleware core with storage operations; system.sessions PITR and oplog flow improvements; routing/UUID handling fixes; and sustained focus on quality through extensive tests and documentation housekeeping. These changes improve data integrity, restore reliability, multi-cloud storage readiness, and maintainability, enabling faster delivery of reliable backup/restore capabilities and safer multi-tenant workflows.
August 2025
July 2025
6 Commits • 2 Features
Jul 1, 2025Month: 2025-07 Concise monthly summary for percona/percona-backup-mongodb: Key features delivered: - Selective configuration server restore and PITR safety: Refined restore workflow to selectively restore config server data, added standard namespaces, restricted operations, and improved handling of system.sessions. Refactor to apply full restores only to config servers and fixes to UUID query handling. - Restore process observability improvements: Added debug logging for routing configuration restoration and document counts after restore to improve visibility and troubleshooting. Major bugs fixed / stability improvements: - Excluded config.collections/chunks from full restore to prevent unintended data restoration. - Implemented special handling for system.sessions docs and corrected UUID query handling to ensure accurate restores. - Ensured custom full restore applies only to config servers (cfgrs). Overall impact and accomplishments: - Enhanced PITR safety and restore accuracy, reducing risk of restoring non-config data and enabling safer recovery workflows. - Improved observability and traceability of restore operations, accelerating troubleshooting and audits. - Stronger alignment with operational procedures through namespace standardization and targeted restore logic. Technologies / skills demonstrated: - Restore workflow refactor, namespace standardization, and targeted restore logic for config servers. - Observability instrumentation with debug logs and post-restore document counts. - Test coverage enhancements related to restore behavior (e.g., balancer settings exclusion).
July 2025
6 Commits • 2 Features
Jul 1, 2025Month: 2025-07 Concise monthly summary for percona/percona-backup-mongodb: Key features delivered: - Selective configuration server restore and PITR safety: Refined restore workflow to selectively restore config server data, added standard namespaces, restricted operations, and improved handling of system.sessions. Refactor to apply full restores only to config servers and fixes to UUID query handling. - Restore process observability improvements: Added debug logging for routing configuration restoration and document counts after restore to improve visibility and troubleshooting. Major bugs fixed / stability improvements: - Excluded config.collections/chunks from full restore to prevent unintended data restoration. - Implemented special handling for system.sessions docs and corrected UUID query handling to ensure accurate restores. - Ensured custom full restore applies only to config servers (cfgrs). Overall impact and accomplishments: - Enhanced PITR safety and restore accuracy, reducing risk of restoring non-config data and enabling safer recovery workflows. - Improved observability and traceability of restore operations, accelerating troubleshooting and audits. - Stronger alignment with operational procedures through namespace standardization and targeted restore logic. Technologies / skills demonstrated: - Restore workflow refactor, namespace standardization, and targeted restore logic for config servers. - Observability instrumentation with debug logs and post-restore document counts. - Test coverage enhancements related to restore behavior (e.g., balancer settings exclusion).
June 2025
18 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for the percona/percona-backup-mongodb repository. Delivered core features to enhance recovery reliability, storage consistency across providers, and safe PITR restores, while expanding observability and metadata handling to improve operations, troubleshooting, and governance. Focused on delivering clear business value: reducing recovery risk, ensuring backup integrity across S3/Azure/GCS, and hardening defaults.
18 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for the percona/percona-backup-mongodb repository. Delivered core features to enhance recovery reliability, storage consistency across providers, and safe PITR restores, while expanding observability and metadata handling to improve operations, troubleshooting, and governance. Focused on delivering clear business value: reducing recovery risk, ensuring backup integrity across S3/Azure/GCS, and hardening defaults.
June 2025
May 2025
29 Commits • 5 Features
May 1, 2025May 2025 monthly summary for percona/percona-backup-mongodb. This period focused on delivering robust restore workflows, expanding end-to-end testing, and strengthening reliability and observability, with a strong emphasis on business value and operational stability. Key features delivered: - Cluster Cleanup Phase: Introduced cleanupCluster state and added cleanup phases during logical restore and logical PITR; enabled cluster cleanup for full restore; addressed RS remapping to improve data integrity during restores. - Physical Restore Cleanup and Restart Improvements: Removed legacy log removal logic, added skip rules for file removal, removed internal mongod logs before phys restore, enhanced restart procedure, and added tests for RemoveAll to ensure cleanup correctness. - E2E Tests and Refactors: Expanded test coverage and test infrastructure for end-to-end scenarios, including balancerStop for e2e-tests, e2e cleanup test in sharded clusters, extraction of moveChunk, and ensuring ts-suffixed logs are preserved in tests. - Fallback integration into CLI and phys restore: Added --fallback-enabled and --allow-partly-done options, integrated fallback behavior with phys restore, improved logging and error messaging, and added free disk space validation for fallback sync. - Backup metadata and cleanup strategy: Expanded backup metadata to include size on RS and broadened cleanup strategy across use cases; introduced nodeStatus check state helpers and applied reviewdog fixes to maintain code quality. Major bugs fixed: - Physical restore robustness and PITR loop fixes: Removed dead code in MarkFailed, fixed close logic, and ensured proper termination of the PITR loop; addressed flaky unit tests related to port readiness. - Physical restore close logic: Refactors to ensure clean termination and stable PITR loop control, reducing hangs and improving reliability. - Typo fixes: Resolved typographical errors across the codebase to improve maintainability and professionalism. Overall impact and accomplishments: - Significantly improved restore reliability (logical, PITR, and physical) and data integrity across restore scenarios, reducing risk for customers during DR and upgrade workflows. - Increased test coverage and CI reliability with targeted E2E tests and stability improvements in critical paths. - Enabled safer operations through fallback controls and CLI options, with validations that protect against resource exhaustion during recovery. - Enhanced metadata visibility for backups and more robust cleanup that supports broader use cases and easier audits. Technologies/skills demonstrated: - Go code quality improvements, cleanup and refactoring, and resilience enhancements in restore workflows. - End-to-end test design and automation, builder/test infra improvements, and preservation of logs with ts suffix for reliable diagnostics. - CLI design and integration for safe fallbacks, logging optimization, and resource validation checks. - Data integrity focus with RS-aware backup metadata and cleanup strategy improvements.
May 2025
29 Commits • 5 Features
May 1, 2025May 2025 monthly summary for percona/percona-backup-mongodb. This period focused on delivering robust restore workflows, expanding end-to-end testing, and strengthening reliability and observability, with a strong emphasis on business value and operational stability. Key features delivered: - Cluster Cleanup Phase: Introduced cleanupCluster state and added cleanup phases during logical restore and logical PITR; enabled cluster cleanup for full restore; addressed RS remapping to improve data integrity during restores. - Physical Restore Cleanup and Restart Improvements: Removed legacy log removal logic, added skip rules for file removal, removed internal mongod logs before phys restore, enhanced restart procedure, and added tests for RemoveAll to ensure cleanup correctness. - E2E Tests and Refactors: Expanded test coverage and test infrastructure for end-to-end scenarios, including balancerStop for e2e-tests, e2e cleanup test in sharded clusters, extraction of moveChunk, and ensuring ts-suffixed logs are preserved in tests. - Fallback integration into CLI and phys restore: Added --fallback-enabled and --allow-partly-done options, integrated fallback behavior with phys restore, improved logging and error messaging, and added free disk space validation for fallback sync. - Backup metadata and cleanup strategy: Expanded backup metadata to include size on RS and broadened cleanup strategy across use cases; introduced nodeStatus check state helpers and applied reviewdog fixes to maintain code quality. Major bugs fixed: - Physical restore robustness and PITR loop fixes: Removed dead code in MarkFailed, fixed close logic, and ensured proper termination of the PITR loop; addressed flaky unit tests related to port readiness. - Physical restore close logic: Refactors to ensure clean termination and stable PITR loop control, reducing hangs and improving reliability. - Typo fixes: Resolved typographical errors across the codebase to improve maintainability and professionalism. Overall impact and accomplishments: - Significantly improved restore reliability (logical, PITR, and physical) and data integrity across restore scenarios, reducing risk for customers during DR and upgrade workflows. - Increased test coverage and CI reliability with targeted E2E tests and stability improvements in critical paths. - Enabled safer operations through fallback controls and CLI options, with validations that protect against resource exhaustion during recovery. - Enhanced metadata visibility for backups and more robust cleanup that supports broader use cases and easier audits. Technologies/skills demonstrated: - Go code quality improvements, cleanup and refactoring, and resilience enhancements in restore workflows. - End-to-end test design and automation, builder/test infra improvements, and preservation of logs with ts suffix for reliable diagnostics. - CLI design and integration for safe fallbacks, logging optimization, and resource validation checks. - Data integrity focus with RS-aware backup metadata and cleanup strategy improvements.
April 2025
7 Commits • 1 Features
Apr 1, 2025April 2025 performance summary for percona/percona-backup-mongodb: Delivered a storage API options pattern across backends with parameterized Save, added logger control to disable logging during S3 saves and Azure writes, and centralized size handling via a storage.Size option; hardened filesystem storage against concurrent list/delete operations and expanded tests to cover parallel workflows; improved test quality and CI reliability by addressing reviewdog suggestions; overall impact: increased reliability for multi-cloud backups, reduced runtime panics, and easier configurability; technologies demonstrated: Go, options pattern, concurrency safety, robust testing, CI tooling.
7 Commits • 1 Features
Apr 1, 2025April 2025 performance summary for percona/percona-backup-mongodb: Delivered a storage API options pattern across backends with parameterized Save, added logger control to disable logging during S3 saves and Azure writes, and centralized size handling via a storage.Size option; hardened filesystem storage against concurrent list/delete operations and expanded tests to cover parallel workflows; improved test quality and CI reliability by addressing reviewdog suggestions; overall impact: increased reliability for multi-cloud backups, reduced runtime panics, and easier configurability; technologies demonstrated: Go, options pattern, concurrency safety, robust testing, CI tooling.
April 2025
March 2025
16 Commits
Mar 1, 2025March 2025 performance summary for percona/percona-backup-mongodb: Focused on reliability, coverage, and operational efficiency. Delivered robust physical restore error handling and cleanup with RS/cluster status checks and conditional fallback migrations, reducing unnecessary operations and improving restore reliability. Enhanced topology reporting and backup execution to include hidden/passive members and to enable backups on passive nodes, increasing data visibility and reducing risk in complex clusters. Hardened selective restore workflows to prevent resource leaks and ensure complete restoration. Implemented quality and operational improvements, including applying reviewdog fixes. Business impact: higher restore reliability, broader backup coverage in mixed-cluster topologies, and faster, safer recovery procedures.
March 2025
16 Commits
Mar 1, 2025March 2025 performance summary for percona/percona-backup-mongodb: Focused on reliability, coverage, and operational efficiency. Delivered robust physical restore error handling and cleanup with RS/cluster status checks and conditional fallback migrations, reducing unnecessary operations and improving restore reliability. Enhanced topology reporting and backup execution to include hidden/passive members and to enable backups on passive nodes, increasing data visibility and reducing risk in complex clusters. Hardened selective restore workflows to prevent resource leaks and ensure complete restoration. Implemented quality and operational improvements, including applying reviewdog fixes. Business impact: higher restore reliability, broader backup coverage in mixed-cluster topologies, and faster, safer recovery procedures.
February 2025
12 Commits • 4 Features
Feb 1, 2025February 2025 performance summary for percona/percona-backup-mongodb focused on reliability, data fidelity, and maintainability. Delivered centralized balancer management for backup/restore with safeguards, extended index specification coverage for backups, and a robust fallback directory restore workflow with data migration utilities and enhanced logging. Also completed security and modernization updates (Go module upgrades, removal of custom map cloning) to strengthen resilience and future-proof the codebase.
12 Commits • 4 Features
Feb 1, 2025February 2025 performance summary for percona/percona-backup-mongodb focused on reliability, data fidelity, and maintainability. Delivered centralized balancer management for backup/restore with safeguards, extended index specification coverage for backups, and a robust fallback directory restore workflow with data migration utilities and enhanced logging. Also completed security and modernization updates (Go module upgrades, removal of custom map cloning) to strengthen resilience and future-proof the codebase.
February 2025
January 2025
4 Commits
Jan 1, 2025January 2025 monthly summary for percona/percona-backup-mongodb. Focused on improving reliability for sharded configurations and stabilizing the test infrastructure, delivering measurable business value in backup integrity and CI determinism.
January 2025
4 Commits
Jan 1, 2025January 2025 monthly summary for percona/percona-backup-mongodb. Focused on improving reliability for sharded configurations and stabilizing the test infrastructure, delivering measurable business value in backup integrity and CI determinism.
December 2024
13 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for percona/percona-backup-mongodb focused on increasing PITR reliability, improving observability, advancing test coverage, and updating core dependencies to bolster stability and security. The team delivered core features, fixed critical PITR and logging bugs, and laid the groundwork for robust OplogRestore testing infrastructure.
13 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for percona/percona-backup-mongodb focused on increasing PITR reliability, improving observability, advancing test coverage, and updating core dependencies to bolster stability and security. The team delivered core features, fixed critical PITR and logging bugs, and laid the groundwork for robust OplogRestore testing infrastructure.
December 2024
November 2024
6 Commits • 2 Features
Nov 1, 2024November 2024 monthly summary for percona/percona-backup-mongodb. Focused on delivering core enhancements to restore fidelity, improving observability, and expanding configuration capabilities to support production-grade operations. The month included two major feature deliveries in the PBM stack and targeted improvements to logging and debugging workflows.
November 2024
6 Commits • 2 Features
Nov 1, 2024November 2024 monthly summary for percona/percona-backup-mongodb. Focused on delivering core enhancements to restore fidelity, improving observability, and expanding configuration capabilities to support production-grade operations. The month included two major feature deliveries in the PBM stack and targeted improvements to logging and debugging workflows.
October 2024
1 Commits • 1 Features
Oct 1, 2024Monthly summary for 2024-10: Focused on delivering a robust MongoDB collections cloning feature using mongorestore with --ns-from/--ns-to, including safety validations and a guard that prevents cloning into an existing target. This work strengthens data migration, staging, and disaster recovery workflows with repeatable, safe cloning of collections in Percona Backup for MongoDB.
1 Commits • 1 Features
Oct 1, 2024Monthly summary for 2024-10: Focused on delivering a robust MongoDB collections cloning feature using mongorestore with --ns-from/--ns-to, including safety validations and a guard that prevents cloning into an existing target. This work strengthens data migration, staging, and disaster recovery workflows with repeatable, safe cloning of collections in Percona Backup for MongoDB.
October 2024
Activity
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Quality Metrics
Correctness90.4%
Maintainability89.0%
Architecture86.0%
Performance82.4%
AI Usage20.8%
Skills & Technologies
Programming Languages
GoJavaScriptMarkdownShellYAML
Technical Skills
API DesignAWSAzureBackend DevelopmentBackupBackup and RecoveryBackup and RestoreBackup and restore testingBenchmarkingBug FixCI/CDCLI DevelopmentCLI developmentCloud StorageCloud Storage Integration
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline