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Modern datacenters employ server virtualization and consolidation to reduce the cost of operation and to maximize profit. However, interference among consolidated virtual machines (VMs) has barred mission-critical applications due to unpredictable performance. Through extensive measurements of RUBBoS n-tier benchmark, we found a major source of performance unpredictability: the memory thrashing caused...
The increasing popularity of clouds drives researchers to find answers to a large variety of new and challenging questions. Through extensive experimental measurements, we show variance in performance and scalability of clouds for two non-trivial scenarios. In the first scenario, we target the public Infrastructure as a Service (IaaS) clouds, and study the case when a multi-tier application is migrated...
The prevalence of multi-core processors has raised the question of whether applications can use the increasing number of cores efficiently in order to provide predictable quality of service (QoS). In this paper, we study the horizontal scalability of n-tier application performance within a multicore processor (MCP). Through extensive measurements of the RUBBoS benchmark, we found one major source...
High resource utilization is an important goal in achieving high return on investment in cloud environments. Guaranteed quality of service (QoS) is an important goal for web-facing applications such as e-commerce. Achieving both high utilization and high QoS simultaneously is a significant challenge, since high utilization often implies more QoS failures such as long response times. In this paper,...
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