Greater virtual machine density ............................................................................................................. 3 Performance and reliability features ................................................................................................... 4 Queue depth throttling ..............................................................................................

Virtualized data center infrastructures demand a solid foundation that delivers scale, resilience, flexibility and efficiency. Hitachi and Cisco, today’s leading advocates of data center infrastructure virtualization, have teamed to develop a blueprint for large-scale data center virtualization that satisfies these demands. Hitachi Unified Compute Platform (UCP) Select for VMware vSphere with C...

This paper describes an approach for automated security analysis of network access controls in operational Infrastructure as a Service (IaaS ) cloud computing environments. Our objective is to provide automated and experimental methods to analyze firewall access control mechanisms aiming at protecting cloud architectures. In order to determine the accessibilities in virtual infrastructure netwo...

The verification of variability models is recognized as one of the key challenges for automated development of product lines. Some computational tools have been proposed to verify product line models and product line configurations models. VMWare is a tool integrating different criteria to verify structural and semantic correctness of models derived from the FORE metamodel. Our tool gives the p...

An important basis for cloud computing are public IaaS cloud services as offered e.g. by Amazon, Rackspace, VmWare. Since IaaS cloud services are often used as a flexible infrastructure for SaaS cloud services, it is important to investigate IaaS cloud services as a basis to realise regulatory requirements in cloud computing, e.g the European Data Protection Directive and the E-Privacy Directiv...

Use of virtual machines (VM), which concept was introduced by IBM, are increasingly due its benefits like better resource utilization and ease system manageability. Although, virtualization of I/O devices can introduce an overhead due to layer increment between VM and host. This penalty is specially wrong when the requested devices have high sustained thoughput and/or low latency. An excellent ...

A scientific computing application and well known synthetic benchmark, the Linpack numerical library has been used to evaluate the performance of cloud infrastructure. Using this application the performance of several key factors in cloud computing such as the influence of the number of virtual machines employed per host, as well as the I/O operations were evaluate . Linpack benchmark was execu...

Execution trace is an important tool in computer architecture research. Unfortunately, existing trace collection techniques are often slow (due to software tracing overheads) or expensive (due to special tracing hardware requirements). Regardless of the method of collection, detailed trace files are generally large and inconvenient to store and share. We present ReTrace, a trace collection tool...