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vmware vcenter converter how to start it
I am sorry if this is too obvious for some of you, but it seems not obvious to most of my customers. Every few days I get the following question from my customers, which I will try to briefly answer in this post. Where can I find vmware vCenter converter in VMware vCenter 4? Unfortunately,…
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ESX host disconnect from VirtualCenter or vCenter Server
VMware ESX host can disconnect from VirtualCenter & have a problem connecting to it again for many reasons. Below I will cover few ways to diagnose the problem, few common resolutions to this issue. In these cases usually the first thing you want to do is to log on through ssh, vcli, or directly on…
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Guest operating system’s memory usage might be overestimated on VMware ESX 4
After installing or upgrading to VMware ESX 4, the Guest operating system’s memory usage might be overestimated on Intel systems that support EPT technology or AMD systems that support RVI technology. This issue might cause the memory alarms in vCenter to go off spuriously even if the guest is not actively accessing a lot of…
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Running vCenter in a virtual machine within a distributed switch is not supported
Update: This post has been updated on Feb 23, 2011 as I have been kicked right and left by my colleagues at VMware, as this post used to be titled “Running vCenter in a virtual machine within a distributed switch is not supported”, where its actually supported. Unfortunately, this info was communicated to me by…
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Are Microsoft really better at virtualizing their own products?
As our company is a partner of VMware, Citrix, & Microsoft. Yop, you heard it all of them at one shop. I get to visit many customers & try to help them find the best virtualization product for their enviornment. Lately, I have noticed a tendancy of many customers saying, “I will go Hyper-V as…
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Configured DSN is pointing to an unsupported ODBC driver error while upgrading to vCenter 4.0
One of the errors my customers repeatly complain about while upgrading to vCenter Server 4 or even when trying to install it from scratch is the following error: “The DSN is pointing to an unsupported ODBC driver. Please re-configure your DSN to use one of the supported drivers.” If you face this problem the first…
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Be Smart & Save huge on Microsoft Licensing with Virtualization
As a start don’t let the title fool you this is not related only to Microsoft virtualization, but to every virtualization platform out there. Don’t let vendors mislead you as the saving can be higher on Microsoft Licenses with non Microsoft Hyper-visor like VMware where you can put more virtual machines on the same hardware…
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Tolly Common Test Plan for Virtual Server Performance
I have been contacted by Kevin Tolly the founder of http://CommonTestPlan.org to evaluate their Virtual Server Performance Test Plan & provide suggestions in that regard about two weeks ago. Kevin & his team were kind enough to provide me with a one year license to their Virtual Server Performance Test Plan Document for my own…
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Red Hat Enterprise Virtualization RHEV-M Demo
It seems Red Had is shifting their focus from Xen as their virtualization platform to KVM. Their new Red Hat Enterprise Virtualizaiton solution is based on KVM. It seems that Red Hat Enterprise Virtualizaiton Solution, when combined with their new management tool called RHEV-M will offer many advanced features. Red Hat Enterprise Virtualization Solution seems…
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Another Secret reason why you should purchase VMware Storage VMotion
As most of you already know VMware Storage VMotion is the ability to live migrate a virtual machine from one storage to another without any downtime. The usage most IT Professional relate to VMware Storage VMotion is the following: The ability to move your virtual machines from a storage or datastore to another for maintenance…
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VMware ESX 4 Reclaiming Thin Provisioned disk Unused Space
Disk Thin Provisioning & its ease of use in VMware vSphere has been one of the most used features. Although Thin provisioning has allowed customers to avoid allocating space upfront & saved them tons of space, it does not unallocate space when files are deleted from the Virtual Machine, this is due to the way…
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IF I was VMware CEO, ……
Don’t get me wrong. I am happy with the current VMware CEO as well the VMware team as over all. My post is more of a message to the VMware Team & specially the CEO. I believe this below tip can help VMware crush the competition, though they have to study it carefully as it…
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VMware vSphere Virtual Machine still show old datastore after storage vMotion
Before I start with the article, I have to point out this is not a VMware bug. Its the VMware admins doing what they are not suppose to do. VMware ESX 3 & VMware ESX 4 Administration Guides mention clearly that you should not VMotion or Storage vMotion a Virtual machine before disconnecting it from…
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When VMware ESX & When VMware ESXi
I have seen tons of articles talking about the differences between VMware ESX & VMware ESXi, but I have not seen many that discuss when to use them. I have noticed that many of my customers get even more confused when reading comparisons between the two, as not all of them have deep understanding of…
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DHCP is not working on MS Windows 2008 Hyper-V
I have been hearing many IT Professionals on many forums on the web complaining that their DHCP Server which is setup at the parent partition of their MS Windows 2008 Hyper-V Server is not working. Further more many of them has reported an error similar to the below one in their error logs: 1041: The…