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HI friends, i know most of you will reply by " it depends on what are you going to host on those VM's" i really understand this and i am fully aware of it but i just want you guys to advise on the "1 CPU with 8 cores part" since i don't really have any background about CPU and cores dedication for Virtual machines.
Thanks all. Popular Topics in Virtualization. Which of the following retains the information it's storing when the system power is turned off? Submit ». Samuk Jun 12, at UTC. Ghost Chili. Halukk Jun 12, at UTC. Thai Pepper.
AndrewS This person is a verified professional. Verify your account to enable IT peers to see that you are a professional. This person is a verified professional. I agree. Nazih Haddad This person is a verified professional. Don91 Jun 12, at UTC. Well, yeah if you have the hardware for it. Hopefully that's a decent primer on design for your system; ping me if you have questions VMware customers run an average of The data comes from virtualization management vendor VKernel , which analyzed , virtual machines across 2, deployments over a period of eight months.
VKernel says the data was collected anonymously through free software tools the vendor offers to VMware customers. Also watch : The hottest virtualization products at VMworld VMware to virtualize Android smartphones for business users. The average customer in the sample has 18 physical hosts and virtual machines, or Smaller customers are actually driving the ratios up, as businesses that installed VMware on fewer than 10 physical hosts are getting 20 VMs onto each server.
Those with 25 to hosts only deploy 11 VMs per server. When asked why larger deployments would have fewer VMs per physical host, VKernel chief marketing officer Bryan Semple says, "Either the larger environments have an embarrassment of wealth and hence are not as efficient, or they have larger applications running on them. Putting more than a dozen virtual machines on each box greatly changes the economics of IT, compared to the old model of one application and operating system per server.
While VMware's virtualization software makes it possible, Semple notes that the consolidation ratios also could not be achieved without advancements in multi-core technology from Intel and AMD. With the average customer using a dual-socket, quad-core machine for a total of eight cores , customers are getting fewer than two virtual machines onto each core. Here's expert advice on proper sizing of physical servers for multiple VMs. Choosing just enough virtual machines, but not too many, for a given server has always been a challenge.
Running a set of virtual servers and the applications that they support on one physical server running just one operating system seems easy enough - at first. But making sure the hardware can support that additional load is a real trick because of the almost infinite variety of the software that runs within the virtual environment - each application making a slightly different set of demands on the host OS and the hardware, says Chris Wolf, analyst at The Burton Group.
Consolidating physical servers into VMs should save money of course, but you can't scrimp too much on the hardware without dragging down the performance of the applications - and risk aggravating end users, says Ian Scanlon, IS operations manager for Computacenter, a data center and IT services company based in London but covering most of Europe. Getting detailed and accurate estimations of how well a server will perform as a VM host is complicated further by the varying ability of different chipsets to support virtual workloads and hypervisors, according to Gordon Haff, high-performance computing analyst at Illuminata.
Virtual machines stress a processor's cache memory harder than a physical server does, and processors differ in their ability to switch between the demands of applications and hypervisors, he says. Both Intel and AMD build in circuits specifically to support both virtualization and the migration of virtual servers.
A given server could have between two and eight processors, each of which has between two and eight processing cores. How well your particular server configuration will fare with an idiosyncratic load of software is almost impossible to predict without very specific and painstaking analysis, says Andi Mann, analyst at Enterprise Management Associates EMA.
Even asking vendor technical or sales reps directly won't get you a specific answer, without your looking at the workloads you intend to put on the server. While there aren't any hard-and-fast rules, a couple of rules of thumb can get you close enough that you'll be able to spot the weak points and where or how to reinforce them, says Massimo Re Ferre, a senior IT architect in IBM's Systems and Technology Group.
First, for every core on a new Intel or AMD processor you can add three to five virtual machines, he says.
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