
This project is a cloud migration initiative carried out at the request of Ewha Womans University’s Quantum Nano Science Institute. The work involved migrating the hosting environment for six previously distributed websites from MediaTemple to AWS, along with a full-scale reconfiguration of the overall infrastructure.
To resolve the operational complexity and inefficiencies caused by managing six separate sites across different server environments, we optimized the infrastructure by consolidating all servers into a single physical server and integrating all databases into a single physical database server.
In addition, domain migration was performed to ensure system-wide consistency, and the consolidation effort delivered strong performance outcomes—achieving average CPU utilization below 5% as part of the overall infrastructure optimization.
1️⃣ Migration to a Cloud Environment to Improve Infrastructure Stability and Performance
The six websites currently in operation were hosted across distributed physical servers, which was creating limitations in terms of system stability and performance. As a result, migrating all sites to an AWS cloud environment—and transitioning to a more stable and scalable infrastructure—was identified as a core requirement. By moving dispersed physical resources into a unified cloud-based environment, the goal was to significantly improve server administration efficiency while also enhancing user experience through performance tuning tailored to each site’s traffic patterns and resource usage. In particular, the client requested an infrastructure design capable of delivering stable service even during traffic spikes by leveraging cloud auto-scaling and load balancing. Establishing regular backup routines and disaster recovery mechanisms to ensure data security and service continuity was also set as a key objective.
2️⃣ Improved Operational Efficiency Through Unified Domain and Network Management
Because the six sites were being operated under different domain providers and server environments, centralized management was difficult. This fragmentation increased maintenance complexity, and tasks such as security patching or system updates had to be performed separately for each site, creating major inefficiencies. To resolve this, the client required that all domains be consolidated under a single management framework and that the network configuration be rebuilt as an integrated environment where consistent policies and security settings could be applied. The objective was to centralize operations such as DNS configuration, SSL certificate management, and security policy enforcement—thereby substantially improving administrator productivity—while maintaining consistent security and performance standards across all sites.
3️⃣ Cost Reduction and Resource Optimization Through Efficient Server Configuration
In the existing physical server environment, each site operated on separate servers with fixed resource allocation regardless of actual utilization, resulting in significant waste. Even during low-traffic periods or for low-traffic sites, the same server resources had to remain provisioned, causing ongoing unnecessary operating costs. Accordingly, the client required an optimized server configuration that allocates resources only as needed, based on accurate analysis of real traffic patterns and resource consumption per site. A dynamic resource management approach—expanding resources automatically during peak periods and scaling down during low usage by utilizing cloud elasticity—was presented as the core strategy to maximize cost efficiency while simultaneously improving service quality.
💡 Successful Migration of Six Websites to the AWS Cloud Environment
All six websites previously hosted in the MediaTemple hosting environment were successfully migrated to an AWS EC2-based cloud infrastructure. To ensure service continuity, a zero-downtime migration approach was applied so users would not experience interruptions. This enabled a stable transition to the cloud without impacting accessibility or usability for existing users. Leveraging AWS EC2’s scalability and reliability, server environments were optimized per site based on individual characteristics. In addition, cloud-based automated backup and monitoring systems were implemented to secure significantly improved stability and security compared to the previous hosting setup.
💡 Maximized Management Efficiency Through Integrated Server and Database Infrastructure
The previously distributed web servers for the six sites were consolidated into a single physical server configuration, dramatically improving maintenance efficiency. By unifying server environments that had been managed separately, operational tasks such as system updates, security patching, and monitoring could be centralized, substantially reducing administrative burden. In parallel, the six sites’ databases were consolidated into a single physical DB server architecture to ensure consistency and efficiency in data management. This integrated database environment also established a structured foundation for backups and recovery operations. Overall, the integrated infrastructure optimized resource utilization, reduced operating costs, and improved system stability and performance.
💡 Unified Management Framework Completed via Domain Migration and Network Reconfiguration
The domains that had been managed separately per site were migrated to AWS Route 53 to establish a centralized domain management framework. By consolidating DNS configurations previously spread across multiple domain providers into Route 53, domain management complexity was eliminated and centralized operations became possible—enabling efficient handling of DNS record updates and domain configuration changes. SSL certificates for all sites were rebuilt, and DNS records were restructured to improve both security and accessibility. Through this unified network environment, a consistent set of security policies and performance standards could be applied across all sites.
💡 Improved Operational Efficiency and Cost Effectiveness Through Infrastructure Performance Optimization
The overall infrastructure was optimized through systematic redesign of resource allocation and traffic distribution mechanisms. By analyzing each site’s real traffic patterns and resource usage, the architecture was rebuilt to allocate only the necessary resources. Traffic distribution was also designed to prevent concentrated load on specific servers, creating a balanced system. As a result of these optimization efforts, highly efficient operating performance was achieved—such as maintaining an average CPU utilization below 5%—demonstrating both optimized resource usage and meaningful operating cost reduction compared to the previous environment.





