A Resilience Assessment Framework for Hybrid Monolithic-Microservices Systems: A Comparative Case Study of Odoo ERP Integration

Alex Kurniawan

Authors

Alex Kurniawan Data Science and Cyber Security, Faculty of Information Technology, Swiss German University, The Prominence Tower Alam Sutera, Jl. Jalur Sutera Barat No. 15, Banten 15143, Indonesia

Keywords:

ISO/IEC 25010, Hybrid Architecture, ERP, Monolith Microservices, Performance Engineering

Abstract

The migration of traditional monolithic Enterprise Resource Planning (ERP) systems to modern architectures often results in complex hybrid systems where a core monolith coexists with new microservices. These hybrid models present significant challenges in ensuring end-to-end reliability and observability. This paper proposes and validates a systematic framework for identifying, analyzing, and resolving performance bottlenecks in such environments, targeting the ISO/IEC 25010 reliability sub-characteristics: Maturity, Availability, Fault Tolerance, and Recoverability. Employing a quantitative pre-test/post-test methodology, a hybrid Odoo-NestJS system was instrumented with a comprehensive observability stack and subjected to targeted stress tests using k6. Baseline tests revealed critical vulnerabilities, including a 7.80% failure rate during resource-intensive requests and severe cascading failures. By implementing targeted architectural interventions, namely asynchronous worker pools, request timeouts, and retry patterns, the optimized system achieved a 100% reduction in processing failures, doubled its throughput, and reduced user-facing downtime errors by 88%. The findings validate that specific operational patterns provide substantial, quantifiable improvements to system stability in a hybrid monolithic-microservice context.

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