Performability Analysis of I/O Bound Application on Container-based Server Virtualization Cluster

Use of server virtualization for providing applications produces overloads that degrade the performance of provided systems. The use of container-based virtualization enabled a narrowing of this overload. On this work, we go a step forward and demonstrate how a broad tuning combination of several performance factors concerning to web cache server - the I/O bound application analysed - to file system and to operating system, led to a higher performance of proposed cluster, when it is executed on a container-based operating system virtualization environment. Availability and performance similarity of web cache service, under non-virtualized and virtualized systems, were evaluated when submitted to proposed web workload. Results reveal that web cache service provided under virtual environment, without unresponsiveness fails due to overload, i. e., with high availability, presents a 6% higher hit ratio and a 21.4% lower response time than those observed on non-virtualized environments.