11 novembre 2010

Is VMware planning to support Hyper-V and Xen?

William Lam, who runs the virtualGhetto blog has discovered more than 1200 undocumented VMware .vmx parameters. Using UNIX/Linux utility strings Lam discovered the parameters in the /usr/lib/vmware/bin/vmware-vmx binary which is used to load a VM configuration file. Based on the contents he discovered Lam makes the following speculations: VMware vSphere is going to support virtual Hypervisors, specifically Microsoft and Xen. vSphere is going to support Mac OSX, by providing EFI Support and support for Darwin as guest OS. ... [Lire la suite]
Posté par jcdemarque à 14:23 - - Permalien [#]
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02 novembre 2010

Moving a Virtual Machine Between Hyper-V Hosts

A virtual machine (or VM) is an entity that is stored on one virtualization host, and that runs an instance of an operating system and uses resources that are presented to it by the virtualization software on that host. In Hyper-V, a VM uses a set of configuration files, and one or more virtual disks (in the format of VHD files). There may come a time when there is a need to move a VM or more between virtualization hosts. I will not go into a debate of why this needs to be done, however, I will just mention that the most common... [Lire la suite]
Posté par jcdemarque à 11:46 - - Permalien [#]
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26 octobre 2010

Cloud : Microsoft Hyper-V s’ouvre à OpenStack

Microsoft continue sa percée dans le cloud computing en nouant un partenariat avec l'éditeur Cloud.com. Windows Server 2008 R2 Hyper-V sera désormais intégré et supporté par la plate-forme open source de cloud OpenStack. --> Le reste est sur le site : http://www.itespresso.fr/cloud-microsoft-hyperv-ouvre-openstack-37158.html
Posté par jcdemarque à 07:29 - - Permalien [#]
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26 octobre 2010

Script to evacuate cluster node on shutdown

A little while ago David posted a really handy solution for evacuating a Hyper-V cluster node on shutdown automatically. The issue that he is trying to address is that normally you should not just shutdown a node in a cluster, rather you should manually move all virtual machines off of the cluster node first.  If you just shutdown a node in a cluster all the virtual machines will be failed over using quick migration. David solved this problem by writing a PowerShell script that works with clustering to live migrate the... [Lire la suite]
Posté par jcdemarque à 07:20 - - Permalien [#]
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20 octobre 2010

Hyper-V is underperforming says Gartner

While busy speaking at the Symposium ITxpo 2010 this week, Gartner analysts are also blogging and sharing some details about their presentations. The most interesting one comes from Thomas Bittman, Vice President and Distinguished Analyst, the firm’s front man for virtualization and cloud computing research. Bittman reports three key details (emphasis our): Virtual machine penetration has increased 50% in the last year. Gartner believes that nearly 30% of all workloads running on x86 architecture servers are now running on... [Lire la suite]
Posté par jcdemarque à 21:50 - - Permalien [#]
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12 octobre 2010

Microsoft Hyper-V vs. VMware ESX & vSphere Operations & Management Cost Analysis White paper

Un livre blanc interessant à lire http://download.microsoft.com/download/1/F/8/1F8BD4EF-31CC-4059-9A65-4A51B3B4BC98/Hyper-V-vs-VMware-ESX-and-vShpere-WP.pdf http://blogs.technet.com/b/fabricem_blogs/archive/2010/10/04/microsoft-hyper-v-vs-vmware-esx-amp-vsphere-operations-amp-management-cost-analysis-white-paper.aspx
Posté par jcdemarque à 16:39 - - Permalien [#]
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06 septembre 2010

Parent memory reserve with dynamic memory

Most people I know who have spent a lot of time with Hyper-V have had the experience of accidentally taking too much memory away from the parent partition.  This happens when they start too many virtual machines – and all of a sudden the performance and responsiveness of the parent partition goes down significantly. The response from people who hit this is usually to stop the last virtual machine that they started, to reduce its memory, and then start it up again. This solution has worked in the past – but is no longer an... [Lire la suite]
Posté par jcdemarque à 14:19 - - Permalien [#]
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03 septembre 2010

Guest Paging vs. Virtualization Paging and Negative Memory Availability

Jeff has discussed this at some length over on the virtualization team blog, but as a general rule of thumb we believe that it is much better to have paging occur inside the guest operating system rather than at the virtualization layer (if paging is needed). The simple reason for this is that the guest operating system has far better understanding of which are the best sections of memory to page out – where as all the virtualization layer can do is to guess at what should be paged out. In my recent demonstrations of dynamic... [Lire la suite]
Posté par jcdemarque à 18:56 - - Permalien [#]
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31 août 2010

Hyper-V Hotfix Rollup now Available

I am a bit late in getting this post up (due to being on the road at TechEd Australia & TechEd New Zealand); but last week we released a hotfix rollup package. This package includes the fixes for three of the five issues that I recently blogged about.  The specific issues that are addressed are: KB Number: KB975530 Title:Stop error message on an Intel Xeon 5500 series processor-based computer that is running Windows Server 2008 R2 and that has the Hyper-V role installed: "0x00000101 - CLOCK_WATCHDOG_TIMEOUT"... [Lire la suite]
Posté par jcdemarque à 22:23 - - Permalien [#]
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20 août 2010

What happens when you Sysprep a system running Hyper-V on Windows Server 2008 R2?

I got asked this question a couple of weeks ago – and I did not know the answer.  After a bit of investigation – I now know the answer – and thought I would take the time to share it with the world (if you do not know what Sysprep is – go and read this first).  The short answer is: Everything just works. The long answer is as follows: Prior to Window Server 2008 R2 (namely in Windows Server 2008) you could run into a couple of problems.  In Windows Server 2008 R2 we have implemented a Sysprep provider to ensure... [Lire la suite]
Posté par jcdemarque à 10:46 - - Permalien [#]
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