Scaling real-life Web server workloads

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In an earlier blog, we compared the performance aspects (such as latency, throughput and CPU resource utilization) of real-life web server workloads in a native environment and a virtualized data center environment. In this post, we focus on yet another important dimension of performance – scalability. For our scalability evaluation tests, we used the widely Read more...

ESX scheduler support for SMP VMs: co-scheduling and more

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ESX supports virtual machines configured with multiple virtual CPUs (for example, ESX 3.x supports up to4 vCPUs). Handling mixed loads of uniprocessor and multiprocessor VMs can be challenging for ascheduler to get right. This article answers some common questions about deploying multiprocessor VMs,and describes the algorithms used by the ESX scheduler to provide both high Read more...

Measuring Cluster Reconfiguration with VMmark

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In my previous blog entry about running VMmark within a four-server cluster managed by VMware Infrastructure 3 version 3.5 (VI3.5), the results showed that a cluster of four servers exceeded the available CPU resources when running 17 VMmark tiles (102 total virtual servers). The scaling then plateaus due to CPU saturation. I suppose that if Read more...

VMmark 1.1 Available

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Just a quick note to let folks know that VMmark 1.1 is available. It went live last week. You can download it here. The new version has a mix of 32-bit and 64-bit virtual machines to better reflect current environments. Please check the Release Notes for full details. Read more...