Enhancing Resiliency Through Chaos Testing: A Report on Fimple’s Banking Solution

In today’s interconnected and rapidly evolving technological landscape, companies face increasing pressure to ensure the resiliency and reliability of their systems. Unexpected disruptions or failures can have severe consequences, leading to financial losses, reputational damage, and customer dissatisfaction. To proactively address these challenges, companies are turning to chaos scenarios as a crucial part of their resilience strategy.

Chaos scenarios, also known as chaos engineering, involve intentionally injecting controlled failures into a system to test its ability to withstand and recover from disruptions. By simulating various failure scenarios, organizations gain valuable insights into their system’s resiliency, identify vulnerabilities, and strengthen their ability to handle unforeseen events.

There are several compelling reasons why companies need to run chaos scenarios for resiliency.

Proactive Risk Mitigation

Chaos scenarios provide a proactive approach to identify and address potential weaknesses before they manifest as critical failures. By deliberately inducing controlled failures, organizations can uncover hidden vulnerabilities, validate their contingency plans, and strengthen their overall system resilience.

Improved Reliability

Chaos scenarios help organizations build more robust and reliable systems. By subjecting the system to real-world failure conditions, companies can identify and rectify weak points, leading to more resilient and fault-tolerant architectures.

Increased Customer Satisfaction

Customers today expect seamless and uninterrupted experiences from the services they use. By running chaos scenarios, companies can uncover and resolve potential service disruptions, ensuring a better customer experience and maintaining their trust.

Business Continuity

Chaos scenarios allow organizations to test their disaster recovery and business continuity plans. By intentionally causing failures and evaluating the effectiveness of these plans, companies can ensure they are prepared for unexpected events and minimize downtime.

Continuous Improvement

Chaos scenarios are not just a one-time activity; they foster a culture of continuous improvement. By regularly subjecting systems to controlled failures, organizations can iterate, learn, and enhance their resiliency over time.

Competitive Advantage

In today’s competitive market, downtime or service disruptions can significantly impact a company’s bottom line and reputation. By actively running chaos scenarios, organizations can demonstrate their commitment to delivering reliable services, gaining a competitive edge in the industry.

Fimple’s Successful Resilience Validation

Fimple conducts chaos testing on our banking solution, which has nearly a hundred microservices and to provide an assessment of the system’s resiliency and ability to compensate all CRUD operations related to relevant functions like accounting, slip generation, charges, and other business functions across microservices during failure scenarios. This simulated a critical error scenario where the system needed to compensate for the reversed operations.

To perform chaos testing, Fimple uses Chaos Monkey for Azure, a tool that allows us to target specific Azure Cloud Kubernetes resources and reverse the operations. During testing, we closely observe the system’s behavior and response to the injected failures. We have observed that the system effectively detects and reverses the affected operations, successfully restoring the integrity of the business data among the microservices.

Based on the results of our chaos testing, we can conclude that our banking solution demonstrates a high level of resiliency and the ability to compensate for business data successfully in the event of an error. We recommend enhancing the system’s resiliency by implementing additional measures such as automated data integrity checks, comprehensive logging, and monitoring mechanisms to promptly identify and address potential errors.

Through the chaos testing process, we have gained valuable insights into our system’s ability to handle critical errors and compensate for affected operations. This highlights the effectiveness of our compensatory mechanisms and emphasizes the importance of continuous chaos testing to ensure ongoing reliability and resilience.

At Fimple, we believe that running chaos scenarios is vital for enhancing system resiliency. By intentionally introducing controlled failures, we can proactively identify weaknesses, improve reliability, ensure business continuity, and provide better experiences for our customers. Embracing chaos engineering as a core practice empowers us to evolve our systems, stay ahead of potential disruptions, and build a foundation for long-term success in our dynamic digital landscape.

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Author Box

İlker Ülger

Chaos Testing and Community Manager

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