This is the primary category on VCritical, covering virtualization and related technology.

Red Hat Enterprise Virtualization HA [ha ha]

Red Hat Enterprise Virtualization has an HA feature -- Red Hat advertises it as equivalent to VMware HA. Take a look at the numerous deficiencies in that product that will have you laughing all the way to the datacenter - HA [ha ha].

RHEV Manager — It’s not just a clever name

The Red Hat Enterprise Virtualization Manager is a single point of failure and the only management interface for RHEV Hypervisors. Oh, and it only runs on a physical Windows box.

Red Hat Enterprise Linux is not Enterprise Virtualization

Red Hat Enterprise Virtualization users may opt for a full installation of Red Hat Enterprise Linux as a hypervisor host. Besides adding extra cost, RHEL KVM packages and management tools are incompatible with RHEV and must be replaced.

What is Red Hat Enterprise Virtualization?

Red Hat Enterprise Virtualization is a new competitor to VMware vSphere. After almost half a year on the market, is anyone using it?

Dear Red Hat…

Satirical open letter to Red Hat from VMware ESX.

Cloudy with a chance of vaporware

A year ago at MMS 2009, Microsoft criticized VMware for not offering public-private cloud federation. Today, Microsoft still has nothing to show in that area.

It’s not Hyper-V — it’s the drivers!

The majority of Windows crashes are caused by third-party device drivers. See how Hyper-V reliability is compromised due to its dependence on a general-purpose OS.

Pimp My Hypervisor

Yo Dawg! I heard you like to virtualize, but there is no truth to the rumor that Xzibit influenced the Hyper-V design.

Taking snapshots of VMware ESX 4 running in a VM

VMware ESX 4 can virtualize itself, and by using a special undocumented configuration setting it is now possible to take snapshots of virtual VMware ESX 4 systems.

Linux apps run directly on Windows with virtualization!

Microsoft has broken through numerous technological barriers, enabling Windows/Hyper-V to directly execute Linux applications.

Hypervisor Footprint Quiz

Humorous take on a reference to small footprint hypervisor advantages -- not from VMware.

Win $2500 with your 1337 VMware ESXi scripting skillz

Win up to $2500 in the VMware ESXi Scripting Contest!

Hello Dynamic Memory?

With Hyper-V R2 out the door, leaked screenshots from a post-RTM build of Windows Server 2008 R2 suggest a Dynamic Memory feature is coming in a successor.

Hyper-V More Stable, Just as Mature as VMware vSphere?

Microsoft Virtualization publishes an embarrassing guest post refuting vSphere advantages, doing more harm than good.

The Truth About Hyper-V Memory Overcommit

Learn about Microsoft's attempt to implement memory overcommit in Hyper-V.

VMware ESXi 4: SD Flash in BL460c G6

HP Blades incorporate an SD slot that can be used to easily deploy VMware ESXi from flash. Take a look.

vSphere issues? Ask VMware.

Certain errors and warnings in the vSphere Client now provide links directly to VMware KB articles with more details on the specific issue.

Book Review: VMware VI and vSphere SDK

Review of Steve Jin's new book on the VMware VI SDK. A great development resource, and administrators may improve their overall understanding of VMware vSphere and PowerCLI scripting.

Best of 2009

The top 6 posts on VCritical by page view and by reader comments.

Easily view guest IP addresses with vSphere Client

The vSphere Client allows administrators to quickly see the IP addresses used inside a virtual machine -- eliminating the need to connect to the console and interact with the guest operating system.

InformationWeek: Hyper-V Not For Enterprise

In an InformationWeek article, Elias Khnaser does an excellent job of articulating several of the key advantages that VMware vSphere has over Hyper-V -- memory overcommit, hypervisor footprint, maturity, and more.

VMware vCenter CapacityIQ 1.0.1 for vSphere

VMware vCenter CapacityIQ 1.0.1 is now fully integrated with VMware vSphere. The product deploys quickly as an OVF virtual appliance and the user interface is a vSphere Client plugin.

The Truth About VM SAN Transfers

While Microsoft marketing material claims Hyper-V and SCVMM can transfer large virtual machine files and templates over a SAN, the truth is that all VM transfers are done over the network. Only VMware ESX leverages high-speed storage area networking for VM migration.

The Truth About Storage Hot Add and Remove

VMware vSphere 4 offers multiple options for expanding virtual machine storage with zero downtime, including the ability to grow a running virtual disk. Hyper-V marketing literature makes a similar claim, but is limited to simply adding another virtual disk.

vSphere Thin-Provisioned Disk Performance

A new paper published by the VMware Performance Team shows that virtual disks using vStorage Thin Provisioning perform nearly as well as fully allocated thick disks.

SCVMM/PRO Complexity: High

According to Microsoft's own documentation, integrating SCOM with SCVMM adds high complexity and additional cost to your virtualization environment.

Layers and Layers of FUD

Microsoft stretches the truth when claiming that VMware adds an additional layer to your architecture. The fact is, Hyper-V relies on its own instance of Windows and requires more instances for running apps.

Which 50% will you virtualize?

Bob Kelley, a Microsoft VP, recently made the claim that only 50 percent of all workloads will be virtualized. The rest of the industry clearly disagrees.

Live Migration “significantly more complicated”

Because of the extra configuration -- and tools -- needed to deploy a complete Hyper-V R2 solution, eWeek concludes that VMware ESX/VMotion is simpler than Live Migration.

Microsoft announces Windows Server 2008 R2. Again.

After being featured at numerous events, Microsoft has finally launched Windows Server 2008 R2 for the last time. Please take a moment to acknowledge the launch -- or they may launch it again.

Windows Server 2008 R2 — Windows 7?

Microsoft released Windows 7 and Windows Server 2008 R2. Thee technical version number for those products is not actually 7, it is 6.1.

Hyper-V Console Disconnects During Live Migration

When a Hyper-V virtual machine console is connected and a live migration is initiated -- automatically with PRO Tips or manually -- the remote client disconnects. The situation must be resolved manually by the administrator, unlike VMware ESX, which seamlessly migrates remote console connections during VMotion.

vSphere Console Stays Connected During VMotion

When an administrator is connected to an VMware ESX virtual machine remote console and that VM is migrated with VMotion to another host, the connection seamlessly migrates to the destination host. Hyper-V does not offer this capability.

Hyper-V Administrators Exhibit Advanced Memory Skills

Hyper-V CSV LUNs have no human-friendly labels, making it difficult for administrators to easily identify volumes. Instead, cryptic GUIDs are shown when monitoring from System Center Operations Manager 2007.

Easy recovery from a full VMware ESX datastore

With VMware vSphere, ESX, and VMFS, running out of space on a datastore does not cause damage to virtual machines. It is easy to recover without even a guest OS reboot.

PowerShell Prevents Datastore Emergencies

When a datastore in your VMware vSphere environment is about to fill up, you can have vCenter automatically spring into action to prevent downtime by using Storage VMotion.

Responsible Thin Provisioning in VMware vSphere

VMware vSphere 4 offers thin provisioned virtual disks backed by management that enables safe use in a production environment thanks to advanced accounting of all provisioned space.

IGT Part 7: Virtual VMware ESX 4 in high demand

This article is part of a series on Incoming Google Traffic (IGT). It is very clear that the VMware community loves the ability to run virtual instances of VMware ESX 4 — this has been the most popular VCritical article ever.  Take a look at these keywords that account for hundreds of searches over the […]

Use Coreinfo to view VM core and socket count

By using an unsupported VM configuration file (vmx) option called cpuid.coresPerSocket, it is possible to present multi-core virtual CPUs to VMware ESX virtual machines.

Hands off that CSV!

In Windows Server 2008 R2, Cluster Shared Volumes enable multiple hosts to access a single shared LUN. However, administrators may not manipulate or back up VM files on a CSV.

Support VMware: 2009 Community Choice Awards

Have you voted in the 2009 Community Choice Awards yet? Deadline is September 16 — if you want to support VMware and have a chance to win $250 at the same time, head over and vote today! Voting Guide For those party members seeking official VCritical recommendations, the following voting guide is offered. VMware appears […]

My VMworld 2009 Experience

VMworld 2009 was held in San Francisco, California at the Moscone center from August 31 – September 3rd.  It was a great show and you could really feel the energy from customers, partners, and VMware people alike. Maybe next year I will do some live blogging from the show, but this time I decided to […]

Notice the new VMware logo?

The font has subtly changed and the three boxes are gone.

The VMware ESXi 4 64MB Hypervisor Challenge

While completely unsupported, it is possible to build a small 64MB flash drive that will boot and run VMware ESXi 4.

If VMware ESXi 4 is so small, why is it so big?

Although VMware ESXi 4 requires a 1GB flash device to install, the core hypervisor functionality is fully contained in less than 60MB. Most of the remaining space is for a downloadable vSphere Client or simply unused.

140 vSpheres/hour

Even in the face of a tough economy and "free" competing hypervisors, VMware continues to acquire customers.

Is SCVMM 2008 R2 really banned from VMworld?

It makes for great drama to say that VMware will not allow Microsoft Virtualization to exhibit their latest product -- but it is not true.

Hello, SCVMM 2008 R2

Originally promised within 60 days of Hyper-V R2, today MSFT announced availability of SCVMM 2008 R2.

A very flashy hypervisor: Hyper-V Server R2

If your server OEM supports it, you might be able to get the free Hyper-V Server R2 to boot from a flash drive someday. VMware ESXi supports this feature today.

New: vSphere Resource Distribution Chart

vSphere makes it easy for administrators to see which virtual machines in a cluster are using CPU and memory.

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