VMmark 2.0 Beta Overview

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As I mentioned in my last blog, we have been developing VMmark 2.0, a next-generation multi-host virtualization benchmark that models not only application performance in a virtualized environment but also the effects of common virtual infrastructure operations. This is a natural progression from single-host virtualization benchmarks like VMmark 1.x and SPECvirt_sc2010. Benchmarks measuring single-host performance, while valuable, Read more...

Microsoft Office SharePoint Server 2007 Performance on VMware vSphere 4.1

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VMware recently released a whitepaper showing the performance scalability of SharePoint Server 2007 on VMware vSphere 4.1. This paper demonstrates that vSphere 4.1 exhibits high performance and includes advanced features that can improve the overall user experience in multi-tier applications such as SharePoint. Results of the experiments, in which up to 171,600 heavy SharePoint users Read more...

Understanding Memory Resource Management in VMware ESX Server 4.1

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We have published a whitepaper about how ESX server 4.1 manages the host memory resource. This paper not only presents the basic memory resource management concepts but also shows experiment results explaining the performance impact for four different memory reclamation techniques: Page sharing, ballooning, memory compression and host swapping used in ESX server 4.1. The Read more...

Enhanced VMware ESX 4.1 CPU Scheduler

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Check out our technical paper on ESX CPU scheduler in vSphere 4.1. This is revised from the previous version to reflect a new feature, wide VM NUMA support.  This paper attempts to answer the following questions: How is CPU time allocated between virtual machines? How well does it work? What is the difference between “strict” and “relaxed” Read more...

Performance Implications of Storage I/O Control in vSphere Environments with Shared Storage

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vSphere based virtualized datacenters often employ a shared storage infrastructure to support clusters of vSphere hosts. Applications running in virtual machines (VM) on vSphere hosts share the storage resources for their I/O needs. Performance of applications can be impacted when VMs contend for storage resources that are shared. Without proper access control for sharing the Read more...